Medical Cannabis for Endometriosis Pain: What Research Says
Many people with endometriosis tell researchers that medical cannabis eases their pelvic and period pain, and some say they now need fewer painkillers [1][2]. Strong trials in people are still scarce, so these are patient reports, not proof. Every form of cannabis can interact with medicines and hormone treatment, which is why the decision belongs in a conversation with a licensed physician.
Built on peer-reviewed research published from 2010 to 2026: patient surveys, reviews and laboratory work
When Endometriosis Pain Isn’t Controlled
Endometriosis pain is easy to underestimate from the outside. It is not an ordinary bad period: it can pin you to the bed for days, flare during sex or on the toilet, and turn every month into a calendar of canceled plans. Many people are told for years that this is simply what periods feel like before anyone looks for the cause [3].
Years before anyone names it
Delays in diagnosis are common worldwide, partly because symptoms vary so much and partly because period pain is normalized, by doctors and families alike [3]. By the time the word “endometriosis” is said out loud, many people have already tried several painkillers and a few different hormone pills.
Pain that outlasts the painkillers
Standard pain relief and hormone therapy help many people, but not everyone, and not without trade-offs. In a large international survey, the most common reason people with endometriosis gave for turning to cannabis was that their prescribed medicines did not control the pain; more than half also named side effects they could not tolerate [1].
The fear of being judged
Asking about cannabis can feel risky. In the same survey, 57.2% worried about being judged because of the stigma around cannabis, and 33.5% of those using it outside a legal program did not plan to tell their doctor [1]. That silence matters: a physician can only check interactions with your other medicines if the cannabis is on the list.
None of this means cannabis is the answer for you. It means the question is reasonable, and that there is a legal way to ask it: with a physician who knows your diagnosis, your hormones and your other prescriptions.
What Is Endometriosis? Definition, Causes and How Common It Is
Endometriosis (pronounced en-doh-mee-tree-OH-sis) is a chronic condition in which tissue similar to the lining of the uterus grows outside the uterus, most often on the ovaries, the fallopian tubes and the lining of the pelvis, and sometimes on the bowel or bladder. This tissue reacts to the monthly hormone cycle, causing inflammation, pain and scar tissue called adhesions that can stick organs together [3][4]. It is a long-term condition, not an acute one: symptoms come and go, but the disease itself does not simply clear up.
It is common. Reviews estimate that about 10% of women and girls of reproductive age have endometriosis [5], with estimates across studies ranging from 5% to 15% [6] – roughly 200 million people worldwide [7]. Nobody knows exactly why it starts. The leading explanations involve menstrual blood flowing backward through the tubes into the pelvis, cells that change type, the immune system failing to clear misplaced tissue, and genes that run in families [3].
Endometrium: where it belongs
What it is: the inner lining of the uterus, which thickens each month and is shed as a period.
Where it is: inside the uterus only.
What it causes: a normal monthly bleed that leaves the body.
Endometriosis: where it grows
What it is: tissue similar to that lining, growing where it should not.
Where it is: ovaries, tubes, pelvic lining, sometimes bowel, bladder or beyond.
What it causes: inflammation, pain and scarring, because the tissue has nowhere to shed.
Quick answers
Is endometriosis genetic?
Partly. Having a mother, sister or daughter with endometriosis raises your own chance of it [8], and research points to many genes that each add a little risk rather than one gene that causes it. Strength of evidence: family studies show a clear link; genes explain only part of the picture.
Is endometriosis autoimmune?
It is not classed as an autoimmune disease, but the immune system is clearly involved. In laboratory and animal work, immune cells behave differently around endometriosis lesions, and the body’s own cannabinoid signals appear to shape that response [7]. Strength of evidence: lab and animal research; it explains mechanisms, not your personal risk.
How do you get endometriosis?
You do not catch it, and nothing you did caused it. It usually starts in the years after the first period. The theories above (backward menstrual flow, changing cells, immune factors and genes) probably work together, and no single cause has been proven [3]. Strength of evidence: leading theories, not settled science.
Can endometriosis go away on its own?
How do you say it, and what is it called in English and Spanish?
Say en-doh-mee-tree-OH-sis, with the stress on “OH.” The lining it comes from is the endometrium (en-doh-MEE-tree-um). In Spanish the word is spelled the same, endometriosis, so if you are searching for “endometriosis en inglés,” the English term is identical, only pronounced differently.
Is Endometriosis Cancer?
No. Endometriosis is a benign, noncancerous condition. The tissue grows where it should not, but it does not spread the way cancer does, and it is not a precancerous stage [3]. Research does link endometriosis to a slightly higher risk of some rare types of ovarian cancer, which is a reason for regular checkups, not a reason to assume the worst [8].
The name causes another mix-up. Endometriosis sounds like endometrial hyperplasia, but the two are different conditions with different risks.
Endometriosis
What it is: lining-like tissue growing outside the uterus.
Cancer risk: it is not cancer; a small link to certain ovarian cancers is studied [8].
Who treats it: a gynecologist, often with a pain or endometriosis specialist.
Endometrial hyperplasia
What it is: the lining inside the uterus becoming too thick, usually from too much estrogen.
Cancer risk: some types can lead to cancer of the uterus if left untreated [9].
Who treats it: a gynecologist, with hormone treatment or, in some cases, surgery [9].
Why “endometriosis cancer survival rate” has no answer
Survival rates are statistics kept for cancers: registries track how many people are alive a set number of years after a cancer diagnosis [10]. Endometriosis is not cancer and is not itself a fatal disease, so no survival rate exists for it. If a cancer is ever found in someone who also has endometriosis, the statistics for that specific cancer apply, and an oncologist is the right person to explain them.
Symptoms, and how endometriosis differs from adenomyosis and fibroids
Symptoms, GI Issues, Adenomyosis and Fibroids
The classic symptoms are pelvic pain, very painful periods, pain during or after sex (dyspareunia), pain with bowel movements or urination, heavy bleeding and trouble getting pregnant [3][4]. Many people also have bloating, constipation or diarrhea, the gut symptoms often called “endo belly,” and are first told they have irritable bowel syndrome. Constant pain and poor sleep bring exhaustion and the foggy, slowed-down thinking people describe as “endo brain.” How bad the pain feels does not always match how much tissue a surgeon finds.
Two other conditions of the uterus cause similar pain and bleeding and are often confused with endometriosis, and they can occur together with it.
Which one are you comparing?
Pick one to see it alone; this table does not diagnose.
| Feature | Endometriosis | Adenomyosis | Fibroids |
|---|---|---|---|
| Where the tissue is | Outside the uterus: ovaries, tubes, pelvic lining, sometimes bowel or bladder. | Lining-like tissue grows into the muscle wall of the uterus. often linked to endometriosis | Noncancerous muscle growths in or on the wall of the uterus [11]. |
| Typical pain | Period pain, pelvic pain between periods, pain with sex, bowel movements or urination. | Severe cramping during periods; a tender, enlarged uterus. | Often painless; pressure, fullness or lower back pain when fibroids are large [11]. |
| Bleeding | Can be heavy, with spotting between periods. | Heavy, long periods are common. | Heavy or long periods are the most common complaint [11]. |
| Fertility | Linked to infertility, though many people conceive [3]. | May make it harder to conceive or carry a pregnancy. | Some fibroids, depending on size and place, affect fertility [11]. |
| How it is found | Symptoms, exam and imaging; confirmed by laparoscopy [4]. | Ultrasound or MRI of the uterus. often linked to endometriosis | Pelvic exam and ultrasound, sometimes MRI [11]. |
Endometriosis also weighs on mental health. A 2024 review reports that people with endometriosis are more likely than people without it to be diagnosed with depression, anxiety and eating disorders [6]. That is a link between the two, not proof that one causes the other, and it is not a finding about cannabis.
How Is Endometriosis Diagnosed?
Diagnosis usually starts with your story: when the pain comes, how bad it is, what helps. A pelvic exam and imaging come next. Ultrasound and MRI can show cysts on the ovaries (endometriomas) and deeper growths, but small patches on the pelvic lining often stay invisible. The only way to confirm endometriosis for certain is laparoscopy: a keyhole surgery in which a surgeon looks inside the pelvis and can take a tissue sample [4]. Many doctors now start treatment based on symptoms and imaging, without waiting for surgery [3].
Which test are you facing?
Choose one to see what it can and cannot show.
Pelvic exam: can show tenderness, a fixed or tilted uterus, or nodules behind the uterus. Can’t show small or surface lesions, so a normal exam does not rule endometriosis out.
Ultrasound: a transvaginal scan can show ovarian cysts (endometriomas) and, in experienced hands, some deep disease. Can’t reliably show thin patches on the pelvic lining [4].
MRI: can map deep endometriosis on the bowel, bladder or ligaments before surgery and help spot adenomyosis. Can’t rule out small surface disease either.
Laparoscopy: can see lesions directly, take a biopsy and often remove disease in the same operation [4]. Can’t avoid the risks of surgery and anesthesia, which is why it is not always the first step.
Blood test: there is no validated blood test for endometriosis yet. Markers such as CA-125 can be raised, but also in many other conditions, so they can’t confirm or exclude it.
Endometriosis ICD-10 codes
In the United States, diagnoses are recorded with ICD-10-CM codes, and endometriosis sits under category N80 [12]. You may see one of these on a referral, an insurance form or the medical records you bring to an evaluation.
| Code | What it covers |
|---|---|
| N80.0- | Endometriosis of the uterus, including adenomyosis |
| N80.1- | Endometriosis of the ovary |
| N80.2- | Endometriosis of the fallopian tube |
| N80.3- | Endometriosis of the pelvic peritoneum (pelvic lining) |
| N80.4- | Endometriosis of the rectovaginal septum and vagina |
| N80.5- | Endometriosis of the intestine |
| N80.6 | Endometriosis in a skin scar |
| N80.A- to N80.D- | Endometriosis of the bladder, the chest, the abdomen and the pelvic nerves |
| N80.8 / N80.9 | Other sites / site not specified |
Which doctor and which center
A gynecologist is the usual first stop. For severe pain, deep disease or repeat surgery, ask for a referral to an endometriosis center or a gynecologic surgeon who specializes in excision surgery, ideally in a hospital where pain medicine, fertility care and colorectal or urology surgeons work as one team. Pain specialists and pelvic floor physical therapists are often part of the plan. A medical cannabis evaluation does not replace any of them; it is one more conversation, with the records they produced.
Could medical cannabis be worth discussing for your endometriosis pain?
Answer a few questions about your diagnosis, your pain and your medicines. You will get a short summary of how your situation fits what research knows, and what to bring up with a physician.
15 questions · about a minute · your answers stay in this browser
How to Treat Endometriosis: Medical, Holistic and Diet Options
There is no cure yet, so treatment aims to control pain, protect fertility when that matters, and keep daily life running [3]. Most plans combine several approaches and change over the years. Choose one to see what it does, what it costs you and how well it is supported.
Hormonal therapy
Birth control pills, progestins such as dienogest or norethindrone, a hormonal IUD and GnRH medicines calm or pause the cycle that feeds the lesions [4].
Irregular bleeding, headaches, weight gain and bone loss with some options; the injectable medroxyprogesterone is limited to about two years because of bone thinning [13].
Well studied and usually the first step; it controls symptoms only while you take it.
Pain relief
Anti-inflammatory painkillers such as ibuprofen or naproxen ease cramping, especially when started before the pain peaks.
Stomach and kidney strain with long use; opioids for severe flares carry dependence risk. See mixing cannabis and ibuprofen.
Widely used; it relieves pain but does not treat the disease itself.
Surgery
Laparoscopy removes or destroys lesions and cysts and frees adhesions; hysterectomy is considered in some severe cases [4].
Surgical and anesthesia risks, recovery time, and symptoms that can return over the years.
Can reduce pain and help fertility in some people; results depend on the surgeon and the extent of disease.
Diet & holistic care
Anti-inflammatory eating, heat, exercise, pelvic floor physical therapy and relaxation help many people cope day to day [6].
Few, but strict elimination diets can cost you nutrients and joy in food without clear benefit.
Limited; no diet plan has been proven best for endometriosis, so changes are worth trying with your doctor, not instead of care.
Self-care is not a fringe idea here. In a 2025 cross-sectional survey of 912 people with endometriosis in Germany, Austria and Switzerland, 75.4% used self-management strategies for pain. Those using cannabis rated it 8 out of 10 for pain relief, and 47.7% of them said they had cut their medication use by more than half [14]. These are self-reports from people who chose cannabis themselves, so they show what is worth studying rather than what to expect.
Can You Get Pregnant With Endometriosis?
Yes, many people with endometriosis get pregnant and have children, some without any treatment. Endometriosis is linked to infertility, though: scarring can block the tubes, cysts can affect the ovaries, and inflammation in the pelvis may make it harder for an egg to be fertilized and implant [3]. Surgery and fertility treatment, including IVF, help many people conceive. If months of trying have not worked, and sooner if you are in your mid-thirties or older, ask for a referral to a fertility specialist.
Cannabis needs a separate answer here. The American College of Obstetricians and Gynecologists advises against using marijuana while trying to conceive, during pregnancy and while breastfeeding, because THC reaches the baby and safety has not been shown [15].
Where are you right now?
Choose the one that fits; nothing here replaces your doctor.
Trying to conceive: hormone therapy for endometriosis is usually stopped when you want to get pregnant, and your doctor will plan that with you. Medical guidance is to stop cannabis before conception as well [15]. Bring up fertility at any medical cannabis evaluation, so the physician can weigh it.
Pregnant: cannabis is not recommended in any form during pregnancy [15]. Endometriosis pain often eases while you are pregnant; if it does not, your obstetrician can suggest pregnancy-safe options.
Breastfeeding: THC passes into breast milk, and guidance is not to use cannabis while nursing [15]. Ask your doctor about pain relief that is compatible with breastfeeding.
On hormone therapy: no study in the research here tested cannabis together with endometriosis hormone treatment. Keep taking what was prescribed, and show the physician the exact medicine and dose so interactions can be checked.
Not planning a pregnancy: the pregnancy warnings do not stop you from asking about medical cannabis, but reliable contraception matters while using it. Say so at the evaluation, along with every medicine you take.
Can Cannabis Help Endometriosis Pain? What the Research Says, and How Strong It Is
Possibly, for some people, but the evidence is mostly what patients report about themselves, plus laboratory work, so it is a reasonable question to raise with a physician rather than an established treatment. Not all studies count the same. A randomized trial in people answers “does it work?” far better than a survey or a cell experiment, and for endometriosis the trials are only beginning.
| Level | What exists for endometriosis | What it can and cannot tell you |
|---|---|---|
| Trials in people | Only a couple of small randomized trials exist in the wider literature, and none has yet produced an effect size for endometriosis pain that can be quoted with confidence. | The only design that can show a real treatment effect; for now, the answer is still open. |
| Patient surveys | Online surveys of hundreds of people with endometriosis in Australia and New Zealand, German-speaking countries and internationally [1][2][14][16]. | Show why people use cannabis and what they feel it does; cannot rule out wishful thinking or self-selection. |
| Reviews | Narrative reviews that summarize animal, cell and survey work on CBD, THC and the endocannabinoid system [5][17][18]. | Map what is known and what is missing; add no new data of their own. |
| Animal and lab work | Mouse models and studies of endometriosis cells, plus lab work on cannabis suppositories [7][19][20]. | Explain why scientists are interested; say nothing yet about patients, and sometimes point in opposite directions. |
Browse the studies yourself
Every study cited on this page, in plain words. Studies about the disease rather than about cannabis are marked as background.
Why people with endometriosis choose cannabis, and what worries them
68.6% started because medicines did not control their pain and 56.3% because of side effects; 56.7% got cannabis outside a legal program, and the authors flag possible interactions with warfarin, clobazam and sedatives [1].
How people manage endometriosis pain on their own
Three in four used self-management; cannabis users rated it 8 out of 10 for pain, and 47.7% of them reported cutting medication by more than half [14].
Cannabis users with endometriosis describe the effects
Users rated cannabis 7.6 out of 10 for easing symptoms; most reported better sleep and less period pain, and 17% reported more tiredness [2].
“A glimmer of hope”: barriers and drivers of medicinal cannabis use
People described cannabis as a way to lower their reliance on other medicines, including opioids, while naming cost, stigma and access as barriers [16].
What patients want endometriosis research to answer
Australians with endometriosis listed their research priorities and what stops them from joining studies, a reminder of how many questions are still open [21].
CBD and THC in endometriosis: uses and mechanisms
Summarizes animal work in which THC and CBD reduced pain sensitivity and inflammation, and survey reports of lower medication use; the authors call safety and effect in patients unproven [5].
Could CBD calm inflammation and new blood vessel growth?
Proposes that CBD might slow lesions by curbing inflammation and the growth of new blood vessels; the evidence is indirect and the conclusion inconclusive [17].
Endometriosis from causes to diet and quality of life
A broad overview of how endometriosis develops, how it is treated, the role of nutrition and its links to depression, anxiety and eating disorders [6].
Cannabis, the gut microbiome and endometriosis
Explores how gut bacteria and the endocannabinoid system signal to each other, and why that may matter for pain and inflammation; the findings are inconclusive [18].
The body’s own cannabinoid may fuel inflammation in lesions
In endometriosis cells, the endocannabinoid 2-AG switched on inflammatory signals through the S1P3 receptor, the opposite of the calming effect seen elsewhere [19].
Cannabinoid receptors shape lesions and immune cells in mice
Removing a cannabinoid receptor gene changed how lesions developed and how immune cells responded in a mouse model [7].
Pharmacy-made cannabis suppositories stay stable
Compounded cannabis suppositories kept most of their THC over 24 months of storage; the study tested the product, not its effect on pain [20].
No studies of this type are cited on this page.
What kinds of studies is this evidence built on?
How to read it: each row is one kind of study, and the bar shows how many published studies on cannabinoids and endometriosis are of that kind, next to the number itself. Stronger designs are at the top. Gray bars are commentary, animal and lab work, which cannot answer whether something helps patients.
Show as a table
| Design | Studies |
|---|---|
| Randomized trials | 2 |
| Other clinical trials | 1 |
| Cohort studies | 1 |
| Cross-sectional studies | 1 |
| Surveys | 8 |
| Guidelines | 1 |
| Narrative reviews | 12 |
| Animal studies | 5 |
| Cell and lab studies | 4 |
| Who was studied | Studies |
|---|---|
| People in clinical studies | 4 |
| People observed, not treated | 29 |
| Whole populations | 12 |
| Cells and molecules | 2 |
| Not classified | 6 |
How big is the effect?
Nobody can say yet. A chart of effect sizes needs several trials that measure the same outcome with a margin of error, and for cannabinoids in endometriosis that set does not exist. What exists are self-ratings: users in one survey scored cannabis 7.6 out of 10 for easing symptoms [2], and in another 8 out of 10 for pain [14]. Those numbers describe how satisfied people who chose cannabis felt, not how much pain it removes compared with a placebo.
What Did People With Endometriosis Report in Surveys?
Surveys are the largest body of human evidence on this question. They tell you, in patients’ own words, why they tried cannabis, what changed and what got in the way. They cannot tell you whether the same would happen to you, because the people who answer are often those who already found it helpful.
What did people with endometriosis tell researchers?
How to read it: each bar is the share of respondents who said this, and the number is printed at its end. The track runs from 0 to 100%. Everything here is self-reported, not measured by a doctor.
Show as a table
| Answer | Share | Study |
|---|---|---|
| Medicines did not relieve the pain enough | 68.6% | 2025 survey, 889 respondents [1] |
| Side effects of medicines were intolerable | 56.3% | 2025 survey, 889 respondents [1] |
| Better sleep | 91% | 2024 survey, 114 cannabis users [2] |
| Less period pain | 90% | 2024 survey, 114 cannabis users [2] |
| Able to take fewer pain medicines | 90% | 2024 survey, 114 cannabis users [2] |
| Less pelvic pain outside periods | 80% | 2024 survey, 114 cannabis users [2] |
| More tiredness as a side effect | 17% | 2024 survey, 114 cannabis users [2] |
| Worried about being judged | 57.2% | 2025 survey, 889 respondents [1] |
| Got cannabis outside a legal program | 56.7% | 2025 survey, 889 respondents [1] |
| Would not tell their doctor (among non-legal users) | 33.5% | 2025 survey, 889 respondents [1] |
Limits of these surveys: respondents were recruited online, often through patient groups, so people who found cannabis helpful are likely overrepresented; diagnoses and pain were self-reported and not checked by a doctor; and products, doses and how often people used them were not recorded in a comparable way [1][2][14].
Two more details are worth knowing. A 2026 review counts survey reports in which 56% of women said they had significantly reduced their medication, and 10.42% of respondents reported adverse events [5]. Both point the same way as the charts, and both come from the same kind of self-reported data.
How Might Cannabinoids Act on Endometriosis?
The body has its own cannabinoid system, the endocannabinoid system, made of receptors called CB1 and CB2 and signaling molecules the body produces itself. It helps regulate pain, inflammation and the menstrual cycle. Reviews describe altered receptor and signal levels in endometriosis and suggest that plant cannabinoids might push them back toward balance [5][18]. That is the theory. The data behind it come from animals and cells, and they do not all agree.
In animals
What was tested: THC and CBD in rodent models of endometriosis, and mice bred without a cannabinoid receptor gene [5][7].
What changed: less pain sensitivity and less nerve-driven inflammation with THC and CBD; without the receptor, lesions and immune responses developed differently.
What it means: a lead worth testing, in animals only.
In cells
What was tested: the body’s own cannabinoid 2-AG on endometriosis cells taken from patients [19].
What changed: 2-AG increased inflammatory signals rather than calming them.
What it means: the system may work differently inside lesions than in the rest of the body.
Animal and cell results do not transfer to people: mouse models capture only part of human endometriosis, and a gene knocked out in a mouse is not the same as a medicine given to a patient [7].
The 2025 lab study that points the other way
Researchers took endometriosis cells and exposed them to 2-AG, one of the cannabinoids the body makes itself. Instead of calming inflammation, 2-AG raised the production of inflammatory signals such as COX-2, IL-1β, IL-6 and IL-8, and it did so through a receptor called S1P3 rather than the classic cannabinoid receptors [19]. The work used a single cell line and tissue from a small group of patients, with no animals and no measure of pain, so it does not show that cannabis worsens endometriosis. It does show that “cannabinoids reduce inflammation” is too simple a summary.
Which Cannabinoids Have Been Studied?
“Cannabis” in these studies means very different things: THC, the compound that changes how you feel; CBD, which does not cause a high; products that combine the two; and prescription medicines made from or modeled on THC and CBD. A result for one does not carry over to another: the drowsiness of THC says nothing about a CBD-only oil, and CBD’s interactions say nothing about THC.
| Substance | What was studied | Design | What came out |
|---|---|---|---|
| Dispensary products (available with a medical card where your state allows) | |||
| THC | Pain sensitivity and inflammation in rodent models; use reported by patients in surveys [5][2]. | Animal studies; surveys | Less pain sensitivity in animals; patients report relief and drowsiness or tiredness. No trial result in people yet. |
| CBD | Inflammation, oxidative stress and new blood vessel growth around lesions [5][17]. | Animal studies; reviews | Encouraging in the lab; inconclusive overall, with no tested treatment in patients. |
| THC + CBD products | Whatever products survey respondents were already using, from flower to oils [1][2]. | Surveys | Self-reported relief; product, dose and ratio were not comparable between people. |
| Lab-only compounds (not available to patients) | |||
| Endocannabinoids and synthetic agonists | The body’s own 2-AG and compounds that act on cannabinoid receptors, in cells and mice [19][7]. | Cell and animal studies | Mixed: some signals calm inflammation, 2-AG fueled it in endometriosis cells. |
| Prescription medicines (FDA-approved, by prescription, not through a card) | |||
| Dronabinol (Marinol, Syndros) | Not studied for endometriosis in the research here. | – | Approved for chemotherapy nausea and AIDS-related weight loss, not for endometriosis [22]. |
| Nabilone (Cesamet) | Not studied for endometriosis in the research here. | – | Approved for chemotherapy nausea, not for endometriosis [22]. |
| Cannabidiol (Epidiolex) | Not studied for endometriosis in the research here. | – | Approved for certain seizure disorders; it is the only FDA-approved CBD medicine [22]. |
Forms of Medical Cannabis: Smoking Isn’t the Only Option
Cannabis is not only smoked. People also vape it, swallow it as capsules, gummies or oils, hold drops under the tongue, rub it on the skin or use it as a suppository. In the endometriosis research, oral, inhaled, topical, rectal and under-the-tongue routes all appear. Each form avoids some risks and keeps others, and none of them is a safe default. This section explains the differences; it does not recommend a form.
How is it used, or how would it be?
Choose the closest; many people combine more than one.
Specific to smoking
Joints, blunts, pipes and bongs burn plant material, and the smoke irritates the throat and lungs. The effect starts within minutes, which some people with sudden pain flares value, but the dose is hard to measure.
Specific to vaping and dabbing
Dry-herb vaporizers, oil pens and cartridges avoid burning, but hot vapor still travels the same airways. Concentrates used for dabbing, such as wax, shatter or rosin, are very strong, which makes the dose even harder to control.
Shared devices
A pipe, vape or joint passed between people also passes on colds and other infections.
Specific to edibles and capsules
Gummies, chocolates, drinks, capsules and swallowed oils avoid smoke entirely. They act slowly, often an hour or more, and last for hours, because the liver processes them before they reach the blood. The classic mistake is a second piece “because the first did nothing,” which is how many unpleasant overdoses start.
Specific to tinctures and sprays
Drops of oil or tincture held under the tongue and mouth sprays avoid the lungs and are measured by the drop or spray. Part of the dose is still swallowed, so the slower, longer effect of edibles partly applies.
Specific to topicals and patches
Creams, balms and salves act mainly where they are applied, and there is no evidence that they reach pelvic lesions. Transdermal patches are different: they deliver cannabinoids into the bloodstream, so their effects and interactions count like any other form.
Specific to suppositories
Rectal and vaginal suppositories are discussed for pelvic pain because they release cannabinoids close to the pelvis as they melt at body temperature. So far the research is laboratory work: pharmacy-made suppositories kept most of their THC for 24 months of storage, but nobody has yet measured how much reaches the tissue or whether it eases pain [20]. They are rarely sold in dispensaries.
Specific to prescription cannabinoids
Dronabinol, nabilone and Epidiolex are medicines with an exact dose, prescribed by a doctor and filled at a pharmacy, not bought with a medical card. None is approved for endometriosis [22].
True of every form
- THC can cause drowsiness, dizziness, anxiety and a fast heartbeat, whatever the route.
- It adds to the effect of sedatives, sleeping pills and opioids.
- Whatever reaches the blood is handled by the liver and can change levels of other medicines.
- No driving after use.
THC, CBD and their ratio matter as much as the form. Choosing both is a conversation for the appointment.
All forms as a table
| Form | What it avoids | What remains |
|---|---|---|
| Smoking | Delay in onset | Smoke in the airways, shared devices, hard-to-measure dose, all effects of THC |
| Vaping & dabbing | Burning plant material | Hot vapor in the airways, very strong concentrates, shared devices, all effects of THC |
| Edibles & capsules | Smoke and vapor, shared devices | Slow, long effect, risk of a repeat dose, liver processing, interactions |
| Tinctures & sprays | Smoke and vapor, shared devices | Effects on the brain, partly swallowed dose, interactions |
| Topicals | Most whole-body effects | Skin reactions; no shown effect on pelvic pain |
| Transdermal patches | Smoke, vapor and swallowing | Whole-body effects, interactions, drowsiness |
| Suppositories | Smoke, vapor and the first pass through the liver | Unknown absorption, few products, effects of THC if it reaches the blood |
| Prescription cannabinoids | Unknown product content | Drowsiness, dizziness, interactions; not approved for endometriosis |
What Science Doesn’t Know Yet
The gaps are not a footnote here; they are most of the story. Researchers writing about cannabis and endometriosis list the same problems again and again.
- No dose, no route, no long-term safety. There are no clinical trials that test how much to take, in what form, or what happens after years of use [5].
- No standard product. People use different strains, oils and ratios, so results cannot be compared or repeated [5].
- Surveys hear from the satisfied. Respondents were recruited online, often through patient groups, diagnoses were not checked, and answers depend on memory [1][14].
- Nobody measured the pain objectively. The largest German-language survey collected only self-ratings, with no data on dose, frequency or route [2].
- Mice and cells are not patients. Mouse models do not capture the full human disease, and the 2-AG finding comes from a single cell line without animal or pain data [7][19].
- THC and CBD are separate questions. CBD has not yet been tested directly in endometriosis models, and what is known about THC does not carry over to CBD, or the other way around [17].
- Suppositories are untested in people. Only their stability in the lab has been studied, not how much is absorbed [20].
For you, this means one thing: whether cannabis is worth trying is a decision to make with a physician who can watch how it goes, not something a study has already settled.
Safety, Side Effects and Drug Interactions
Most side effects people report are mild and pass, but they matter more when you are already exhausted by pain or taking several medicines. In surveys summarized in a 2026 review, 10.42% of respondents reported adverse events [5]. Research on cannabis users names drowsiness, anxiety and a fast heartbeat most often; in one endometriosis survey, tiredness was the side effect users mentioned [2].
Drowsiness
The most common effect of THC. It can feel like better sleep while making mornings, work and driving harder.
Anxiety
Higher THC doses can trigger nervousness or panic, especially in people who already live with anxiety.
Fast heartbeat
THC can speed up the heart for a while. If you have a heart rhythm problem, say so at the evaluation.
Fatigue
Reported by users with endometriosis as a side effect, on top of the tiredness the disease itself brings.
Edibles act late
Swallowed products can take an hour or more to work. Taking a second dose too early is a common cause of a bad experience.
Driving
THC slows reaction time and judgment. Do not drive after using any form of cannabis.
Drug interactions to discuss with a doctor
Open each one. This is what the studies recorded, not a complete list.
Warfarin drug-level data
Researchers flag warfarin among the medicines with potentially important interactions [1]. Cannabinoids, CBD in particular, are cleared by the same liver enzymes, which can push warfarin levels and bleeding risk up. If you take a blood thinner, your INR may need closer checks.
Clobazam drug-level data
This seizure and anxiety medicine is named in the same warning [1]: CBD can raise its levels and deepen drowsiness. Do not change the dose yourself.
Sedatives and other CNS depressants drug-level data
Sleeping pills, some antihistamines, muscle relaxants and alcohol slow the brain, and cannabis adds to that effect [1]. The combination raises the risk of confusion, falls and slowed breathing. More on mixing cannabis and Xanax.
Opioids and benzodiazepines: do not cut back on your own clinical data
Any medicine your doctor does not know about clinical data
Reviewers point out that the most common risk is not a specific pill but use without medical supervision or disclosure, which hides interactions and effects across the whole body [5].
Hormonal therapy for endometriosis: ask your doctor no study data
No study in the research here tested cannabis together with birth control pills, progestins or GnRH medicines. That is not a green light; it is a gap. Keep taking your hormone treatment as prescribed and let the physician review the combination.
Bring the complete list to the appointment: prescriptions, hormone treatment, over-the-counter painkillers and sleep aids, supplements and anything taken “only on bad days.” That list, more than the diagnosis, decides whether cannabis is reasonable to try. The physician also asks about dosing medical cannabis carefully, starting low.
Who Should Not Use Medical Cannabis for Endometriosis
For some people the answer is “not now” or “not at all,” whatever the pain. Studies in this field leave these groups out or flag them as risky, so there is no evidence of safety for them.
- Pregnancy or breastfeeding – THC reaches the baby, and medical guidance is to avoid cannabis in any form [15].
- Trying to conceive – guidance is to stop cannabis before conception, and your fertility plan comes first [15].
- A history of psychosis – hallucinations or delusions; THC can bring them back or worsen them.
- Several sedating medicines already – sleeping pills, clobazam and other CNS depressants add up with cannabis [1].
- Plans to cut opioids or benzodiazepines on your own – tapering needs a doctor, whatever replaces it [5].
- New, unexplained pain with fever, or pain very different from your usual pattern, get checked first; cannabis can mask a problem that needs treatment.
Talk to a licensed physician about whether any of these apply
Is Endometriosis a Qualifying Condition for a Medical Marijuana Card?
It depends on your state. Every medical cannabis program keeps its own list of qualifying conditions, and a physician has to match your diagnosis to that list. Few lists name endometriosis outright, but many cover it through broader wording: chronic pain, severe or intractable pain, or any condition a physician judges debilitating.
The lists change as legislatures and health departments update them, so the current wording for your state is the one that counts. The final decision rests with a licensed physician after an evaluation, using your records.
Endometriosis is named
The simplest case. Bring a record of the diagnosis, a gynecologist’s note, imaging or surgical report, and the physician evaluates you against that listed condition.
Chronic or severe pain is listed
This is the most common path for endometriosis. What counts is pain documented in your records, not the word on its own.
Neither is listed
A card may not be available yet where you live. Some states let physicians certify other debilitating conditions or accept petitions to add new ones.
What else has a doctor diagnosed?
State lists name diagnoses, not symptoms: pick what is in your records.
Chronic pain: the most widely listed condition across state programs, and the usual route for endometriosis. Read chronic pain and medical cannabis.
IBS or IBD: inflammatory bowel disease such as Crohn’s disease is on many lists; irritable bowel syndrome on fewer. Bowel endometriosis is sometimes first mistaken for IBS. Read inflammatory bowel disease and medical cannabis.
Anxiety: several states list anxiety disorders or accept them under broader wording, and anxiety is more common with endometriosis [6]. Read anxiety and medical cannabis.
Depression: fewer states list it, and THC can affect mood in both directions. Read depression and medical cannabis.
Infertility: rarely a qualifying condition on its own, and the pregnancy cautions above apply. Read infertility and medical cannabis.
None of these: then the decision rests on your state’s wording for pain and the physician’s judgment. Start with your state’s medical marijuana laws.
Medical cannabis by state: legal status, possession limits, taxes and home growing
Four things change from one state to the next: whether cannabis is legal for medical use only or for all adults, how much a patient may buy and keep, how cannabis is taxed, and whether patients may grow plants at home. The rules also differ on whether pain-related conditions like endometriosis can qualify. These numbers change often, so this page does not repeat them; each state is laid out, with its official program, on the laws and regulations pages.
Medical vs recreational: what’s the difference?
In states with adult-use sales, adults can buy without a card. A card still changes several things, though the details are set state by state.
| Aspect | With a medical card | Recreational |
|---|---|---|
| Taxes | Often lower; some states waive part of the cannabis tax for patients | Full state and local cannabis taxes |
| Purchase and possession limits | Often higher; depends on your state | Set for adult-use buyers |
| Products and strength | Medical dispensaries and, in some states, stronger or medical-only products | Adult-use product range |
| Age | Patient age rules set by each program | Adult-use age limit set by the state |
| Physician involvement | A licensed physician reviews your diagnosis, medicines and the form that suits you | None |
| Legal protection | Registered patient status under state law, recorded in a confidential registry | Adult-use rules only |
How much can a medical card save you?
It can save money, but only where your state taxes patients less than recreational buyers, and the amount depends on your state’s tax rates and how much you buy each month. Weigh that against the evaluation fee and any state registration fee. The breakdown is in medical vs. recreational cannabis taxes, and the wider differences in medical and recreational cannabis compared.
About medical marijuana in your state
Qualifying is the first of two steps. In most states a physician’s recommendation is followed by registration with the state health department, which issues the card and enters you in a confidential patient registry; in a few, the recommendation itself is what a dispensary asks for. Purchases happen at licensed dispensaries, where products are lab-tested and labeled with their THC and CBD content, unlike the unregulated products more than half of survey respondents relied on [1]. Many state laws also let a patient name a registered caregiver to buy on their behalf; who qualifies is set by each state. Cards from one state are not automatically valid in another; see which states accept out-of-state cards.
Firearms, Employment, Privacy and Disability
A medical card is a state document, and federal law still treats cannabis as a controlled substance. That gap is where most worries come from. Here is what changes and what does not.
Can I own a firearm with a medical card?
Federal law bars anyone who is an “unlawful user” of a controlled substance from having or buying a firearm [23], and cannabis remains federally controlled even where a state allows it. The federal form every gun buyer fills out at a licensed dealer asks about this directly, and answering it falsely is itself a federal offense. A state card does not change the federal rule. If you own firearms or plan to, think this through before you apply, and read your state’s rules on the laws and regulations pages.
Will it affect my job or a drug test?
A drug test detects THC whether or not you have a card. Some states protect registered patients from being fired or refused a job for off-duty use; many do not, and employers can still forbid being impaired at work. Federal jobs, safety-sensitive roles and positions regulated by the Department of Transportation follow federal rules, where a card offers no protection. Check your state’s employment rules on the laws and regulations pages and your employer’s policy before you start.
Who finds out, and should I tell my gynecologist?
Your medical records are protected under the HIPAA Privacy Rule [24], and state patient registries are confidential; dispensaries and police can usually check only whether a card is valid. Telling your gynecologist is your choice, but it is usually worth it: they prescribe your hormone therapy and painkillers, and only someone who knows about the cannabis can check how everything fits together. More than half of survey respondents worried about being judged for using cannabis [1]; a matter-of-fact “I want to make sure this is safe with my other medicines” tends to go over well.
Is endometriosis a disability?
It can be. Social Security does not list endometriosis by name, but evaluates whether your symptoms, documented in medical records, keep you from working [25]. Under the Americans with Disabilities Act, a condition that substantially limits major life activities can count as a disability, which may entitle you to reasonable accommodations at work, such as flexible hours during flares [26]. Both depend on your individual case and your records. A medical card does not affect either.
Talk to a Licensed Doctor About Your Endometriosis Pain
Here is where things stand. People with endometriosis report less pain and better sleep with cannabis, but strong trials are missing, the forms and doses are not standardized, and interactions with hormones and painkillers are real. A good evaluation is a conversation about your pain, the medicines already in use and what would count as “better.” It goes faster and safer when the facts are on the table.
What to bring to the appointment
Tap each item as you get it ready.
Questions worth asking
- Which of my current medicines, including my hormone therapy, could interact?
- THC, CBD or both, and why that choice for pelvic pain?
- Which form fits my pain pattern, and what does it not avoid?
- How would we know within a few weeks whether it is helping?
- What should make me stop right away, and whom do I call?
An evaluation makes sense if
- Your pain has not settled with the usual treatment, or its side effects are hard to live with.
- Your full medicine list can be reviewed.
- You are not pregnant, breastfeeding or trying to conceive.
- Your state’s program covers endometriosis or chronic pain.
It is not the right step if
- The hope is to cure endometriosis or skip surgery that you need.
- The pain is new, different or comes with fever, and has not been checked.
- You plan to stop prescribed opioids or benzodiazepines on your own.
- There is a history of psychosis.
This page summarizes published research for education. It does not replace a physician’s advice. Cannabis does not cure endometriosis, and the evidence for pain relief comes mostly from patient surveys.
How to Get a Medical Marijuana Card for Endometriosis
Everything happens online, so there is no clinic to travel to and no waiting room to sit in. Four steps take you from the first form to a card your state recognizes.
Find your path: where are you starting from?
Fill in the intake form
Your state, your diagnoses and your current medicines. Have the record of your endometriosis diagnosis or pain history ready to upload.
See a physician licensed in your state
A one-on-one appointment online. You agree on the time with the physician; keep an hour free rather than a minute.
Receive your signed recommendation
If the physician approves, the signed recommendation arrives in your account.
Register with your state
Where required, you submit the recommendation to the state program, which reviews it and issues the card.
What you end up with
Across 250 reviews from patients in the states where we are licensed. We do not sort them by score and do not hide the low ones.
- 150,000+patients evaluated – everyone who has been through an appointment with us, in every state where we are licensed
- Since 2017doing only this: online evaluations for medical cannabis programs, and nothing else on the side
A recommendation from a physician licensed where you live, and, once your state registers it, a card that lets you buy at licensed dispensaries. After you submit the form, the next steps, the appointment and the signed documents all appear in your account and documents, and how the medical card works explains the evaluation in detail. The physicians who see patients are listed on our physicians page.
Programs for veterans and for people with low income are available in some states.
Renewing your medical card
Cards expire on a schedule your state sets, and renewal means a repeat evaluation with your updated medicines and a new recommendation. Start a few weeks before the expiry date so there is no gap. Bring any changes since last time: new surgery, new hormone therapy, a pregnancy, because they change what the physician weighs. Your state’s page, reached from the list of states at the top of this article, links to its own renewal steps, and the evaluation fee is shown before you pay. More answers are in the renewal question below.
Endometriosis and Medical Cannabis FAQ
Is endometriosis cancer?
No. Endometriosis is a benign condition: the tissue grows outside the uterus but does not spread like cancer [3]. It is linked to a slightly higher risk of some rare ovarian cancers, so regular checkups matter, and new symptoms such as bleeding after menopause or lasting bloating deserve prompt attention.
Can endometriosis go away on its own?
What is the ICD-10 code for endometriosis?
Endometriosis is coded under category N80 in ICD-10-CM, with separate groups by location, for example N80.1- for the ovary and N80.3- for the pelvic lining, and N80.9 when the site is not specified [12]. Your records may show a longer, more specific code; see the full table.
Is endometriosis considered a disability?
Can I use medical cannabis while on hormone therapy?
Nobody has studied the combination directly, so the honest answer is “ask your doctor.” Keep taking your hormone treatment as prescribed, and show the physician the exact medicine and dose at the evaluation. If you are on hormones because you are preparing for pregnancy, cannabis is not advised [15].
Should I tell my gynecologist that I use cannabis?
What about delta-8 THC or CBD products sold without a card?
Hemp-derived products sold in shops and online are often less tightly regulated than dispensary products, and labels may not match what is inside. Delta-8 THC acts much like regular THC, with the same drowsiness and interaction risks. Reviewers warn that unregulated cannabis carries risks of contamination and unpredictable strength [5].
Can I use my card in another state?
Sometimes. Reciprocity (one state honoring another state’s card) exists in some states and not others, and rules for visitors vary. Check which states accept out-of-state cards and traveling with cannabis before a trip.
What if my medical card is lost?
Most states let you request a replacement from the program that issued it, usually through the same online portal where you registered. The steps are in what to do if your card is lost and the medical card FAQ, and your recommendation stays in your account and documents.
How do I renew my medical card?
Cards expire on a schedule your state sets. Renewal means a repeat evaluation with your updated medicines and a new recommendation, then renewing with the state where required. Start a few weeks early and bring any changes in diagnosis or prescriptions. Choose your state from the list at the top of this page to see its renewal steps.
How much does it cost, and what if I’m not approved?
The evaluation fee for your state is shown before you pay; a state registration fee, where one exists, is paid to the state separately. Whether a recommendation is issued is the physician’s medical decision. What is included and what happens if you are not approved are explained on how the medical card works.
Is an online evaluation legitimate?
Yes, where state law allows telemedicine for medical cannabis evaluations. The appointment is with a physician licensed in your state, one-on-one, and the recommendation is the same document an in-person visit would produce. Your health information is handled under the HIPAA Privacy Rule [24].
More research on cannabis and endometriosis
This page cites a selection of studies. Our research library holds every study we track on cannabis and endometriosis, from laboratory work to clinical trials, and lets you filter them by cannabinoid, study type and year.
- studies
- 120+
- in people
- 51
- clinical trials
- 2
References
26 sources
- 1. ‘In the weeds’: navigating the complex concerns, challenges and choices associated with medicinal cannabis consumption for endometriosis. DOI: 10.1530/RAF-24-0098 PMID: 40445778
- 2. Cannabis use in endometriosis: the patients have their say-an online survey for German-speaking countries. DOI: 10.1007/s00404-024-07652-6 PMID: 39162801
- 3. World Health Organization. Endometriosis (fact sheet). 2023.
- 4. Eunice Kennedy Shriver National Institute of Child Health and Human Development. Endometriosis. 2026.
- 5. Cannabidiol and ∆9-Tetrahydrocannabinol in Endometriosis: A Literature Review on Therapeutic Applications and Mechanisms. DOI: 10.5935/1518-0557.20250168 PMID: 41248202
- 6. Endometriosis: A Comprehensive Analysis of the Pathophysiology, Treatment, and Nutritional Aspects, and Its Repercussions on the Quality of Life of Patients. DOI: 10.3390/biomedicines12071476 PMID: 39062050
- 7. Endocannabinoids and their receptors modulate endometriosis pathogenesis and immune response. DOI: 10.7554/eLife.96523 PMID: 39120997
- 8. Office on Women’s Health, U.S. Department of Health and Human Services. Endometriosis. 2026.
- 9. American College of Obstetricians and Gynecologists. Endometrial Hyperplasia. 2026.
- 10. National Cancer Institute, SEER Program. Cancer Stat Facts: Ovarian Cancer. 2026.
- 11. Office on Women’s Health, U.S. Department of Health and Human Services. Uterine Fibroids. 2026.
- 12. Centers for Disease Control and Prevention, National Center for Health Statistics. International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM). 2026.
- 13. MedlinePlus, U.S. National Library of Medicine. Medroxyprogesterone Injection. 2026.
- 14. The role of self-management in endometriosis pain: insights from a cross-sectional survey in Germany, Austria, and Switzerland. DOI: 10.1007/s00404-025-08019-1 PMID: 40253561
- 15. American College of Obstetricians and Gynecologists. Marijuana Use During Pregnancy and Lactation, Committee Opinion No. 722. 2017.
- 16. “A glimmer of hope”: Perceptions, barriers, and drivers for medicinal cannabis use among Australian and New Zealand people with endometriosis. DOI: 10.1530/RAF-23-0049 PMID: 37855429
- 17. Cannabidiol as a possible treatment for endometriosis through suppression of inflammation and angiogenesis. DOI: 10.1002/iid3.1370 PMID: 39110084
- 18. Cannabis and Endometriosis: The Roles of the Gut Microbiota and the Endocannabinoid System. DOI: 10.3390/jcm12227071 PMID: 38002684
- 19. S1P3 Receptor Mediates the Proinflammatory Effect of the Endocannabinoid 2-Arachidonoylglycerol in Endometriotic Epithelial Cells. DOI: 10.1096/fj.202502415R PMID: 41294926
- 20. Optimization and Evaluation of Cannabis-Based Magistral Formulations: A Path to Personalized Therapy. DOI: 10.3390/ph18010073 PMID: 39861136
- 21. Unmet Needs of Australians in Endometriosis Research: A Qualitative Study of Research Priorities, Drivers, and Barriers to Participation in People with Endometriosis. DOI: 10.3390/medicina59091655 PMID: 37763774
- 22. U.S. Food and Drug Administration. FDA and Cannabis: Research and Drug Approval Process. 2026.
- 23. Legal Information Institute, Cornell Law School. 18 U.S. Code § 922: Unlawful acts. 2026.
- 24. U.S. Department of Health and Human Services. The HIPAA Privacy Rule. 2026.
- 25. Social Security Administration. Disability Evaluation Under Social Security (Blue Book). 2026.
- 26. U.S. Department of Justice, Civil Rights Division. Introduction to the Americans with Disabilities Act. 2026.