What is endometriosis and how would I know I have it?
Endometriosis is tissue similar to the womb lining growing where it should not, inflaming and scarring with each cycle. The signature is pain: periods that derail life, deep pain with sex, painful bowel movements during periods, and sometimes fertility struggles.
Diagnosis averages seven years late worldwide, largely because severe period pain gets normalized. Pain that fails simple treatment is a flag, not a personality trait.
Ultrasound can miss it; specialists and sometimes laparoscopy make the call. Treatments from hormonal suppression to excision surgery really improve life, which is why pursuing the diagnosis matters.
Source: NHS, endometriosis
See a doctor promptly if
- Sudden severe pelvic pain with fever, vomiting, or collapse. This needs emergency assessment
- A positive pregnancy test with one-sided pelvic pain or shoulder-tip pain. Possible ectopic pregnancy, go to emergency care
- Period pain that regularly stops you working, studying, or leaving the house
- Blood in stool or urine, especially around your period
- Bleeding between periods or after sex that keeps happening
The stages, and what they do and do not tell you
| Result | In short | What it means |
|---|---|---|
| Stage 1, minimal | Few small spots | Superficial deposits and few or no adhesions. Pain can still be severe. The stage describes what a surgeon sees, not what you feel. |
| Stage 2, mild | Deeper deposits | More and deeper implants, possibly a few adhesions. Still commonly missed on a scan, because superficial disease does not show. |
| Stage 3, moderate | Cysts and adhesions | Deeper disease with endometriomas on an ovary and more adhesions. This is the stage a scan usually starts to pick up. |
| Stage 4, severe | Extensive, often frozen | Large cysts, dense adhesions and organs stuck together. Most likely to affect fertility and most likely to need specialist surgery. |
| How the stage relates to pain | Barely at all | This is the most important line in the table. Stage 1 disease can hurt more than stage 4. The staging system was built to predict fertility outcomes, not symptoms. |
| Average time to diagnosis | Years, not months | Studies across several countries put it between four and eleven years. The commonest reason is period pain being treated as normal. Pain that stops you doing things is not normal. |
Staging comes from what a surgeon sees at laparoscopy. It predicts fertility reasonably and pain barely at all, which is the thing to hold on to. Check it against the guidelines.
Try the cycle tracker30 seconds, free, nothing to installCycle day, the next one and the fertile window, kept on your own device.
When a second opinion is worth asking forWhat to bring, what it costs, and the situations where doctors expect to be asked
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Answered by the AskDoc Medical Team · Medically reviewed under our Medical Director, MBBS · How we review
For muscle aches and period pain
Heat works for cramps and sore muscles, without side effects. An electric pad beats a hot water bottle for steady, safe temperature.
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