Endometriosis is a common condition where tissue similar to the lining of the uterus grows in places it shouldn't — yet many people wait years for an answer. This guide explains what it is, the symptoms, how it's diagnosed, and the options for managing it.
What is endometriosis?
Endometriosis is a condition in which tissue similar to the lining of the uterus (the endometrium) grows outside the uterus — often on the ovaries, fallopian tubes, the outer surface of the uterus, and the lining of the pelvis. Like the womb lining, this tissue responds to hormonal changes across the menstrual cycle, building up and breaking down. But because it has no way to leave the body, it can drive inflammation, pain, and over time the formation of scar tissue and adhesions that bind organs together.
It is also frequently under-diagnosed. Because symptoms overlap with other conditions and pelvic pain is often dismissed, many people experience long delays — sometimes years — before they are correctly diagnosed. That delay is one of the most important problems to fix.
How common is it?
Endometriosis is thought to affect roughly 1 in 10 women and people assigned female at birth of reproductive age. It can begin in the teenage years and continue into midlife. It is not rare, not contagious, and not something you caused. It can run in families, and symptoms vary enormously from person to person — some have severe pain, others have few symptoms but struggle with fertility.
One question many people ask is whether endometriosis raises the risk of cancer. To put it in perspective: endometriosis is associated with a small increase in the risk of certain ovarian cancers (particularly clear-cell and endometrioid types), but the overall risk remains low for most people, and a diagnosis does not by itself change routine screening. If you're worried, it's a reasonable thing to discuss with your clinician.
Endometriosis symptoms
Symptoms differ widely, and the amount of tissue present does not reliably predict how much pain someone feels. Common endometriosis symptoms include:
- Severe period pain that disrupts daily life — pain that stops you working, studying, or sleeping, and isn't controlled by ordinary painkillers.
- Chronic pelvic pain that can occur outside your period, not just during it.
- Pain during or after sex (deep pain rather than at the entrance).
- Pain with bowel movements or urination, often worse around the time of your period.
- Heavy periods or bleeding between periods.
- Difficulty getting pregnant — for some people, fertility problems are the first sign.
- Fatigue, bloating ("endo belly"), nausea, and bowel or bladder symptoms that flare cyclically.
Several of these symptoms — irregular or heavy bleeding, pelvic discomfort, and trouble conceiving — overlap with other conditions, including PCOS (polycystic ovary syndrome) and fibroids. That overlap is one reason a proper assessment matters: the right diagnosis points to the right treatment.
Debilitating period pain is not "just normal"
This is the message that matters most. Mild period cramps are common, but pain that regularly stops you from living your life is not something you have to endure. Pain bad enough to make you miss school or work, vomit, or stay in bed deserves assessment — it can be a sign of endometriosis, adenomyosis, or uterine fibroids. Being told to "just put up with it" is not good enough.
How is endometriosis diagnosed?
There is no single quick test, which is part of why diagnosis is often delayed. Assessment usually combines several steps:
- Clinical assessment. A detailed conversation about your symptoms and their pattern, sometimes with a pelvic examination. A symptom diary can help.
- Imaging. An ultrasound (often transvaginal) or, in some cases, an MRI can detect endometriomas (cysts on the ovaries) or deeper disease — though normal imaging does not rule endometriosis out.
- Laparoscopy. A laparoscopy is keyhole surgery in which a surgeon looks inside the pelvis through a small camera. It has long been considered the most definitive way to confirm endometriosis and can sometimes treat it in the same procedure. It is not always needed — many people can be diagnosed and managed based on symptoms and imaging.
If your symptoms point to endometriosis, treatment can often begin before a surgical diagnosis is confirmed.
Endometriosis treatment options
There is no cure, but symptoms can usually be managed well, and a multidisciplinary approach — combining medical, surgical, and supportive care such as physiotherapy and pain specialists — often works best. The right plan depends on your symptoms, age, and whether you're hoping to conceive. The options below are described in general terms, not prescribed; choices are made with a clinician.
| Approach | What it involves | Often considered when |
|---|---|---|
| Pain relief | NSAIDs (such as ibuprofen) and other analgesia to reduce pain and inflammation | First-line for symptom relief; used alone or alongside other treatments |
| Hormonal therapies | Combined or progestogen-only methods, hormonal IUS, or other hormone treatments to suppress the cycle and calm the tissue | To reduce pain and bleeding; not suitable while trying to conceive |
| Surgery | Laparoscopy to remove or destroy endometriosis tissue and adhesions | When pain is severe, fertility is affected, or other treatments haven't helped |
| Fertility support | Specialist input, which may include assisted reproduction | When endometriosis is affecting the ability to conceive |
Many people also find self-management strategies helpful — heat, gentle movement, pelvic-floor physiotherapy, and support for the mental and emotional toll of living with chronic pain. If you're choosing a hormonal method partly for symptom control, it's worth discussing how this fits with your wider needs; if you want to avoid hormones, ask about non-hormonal options.
Endometriosis and menopause
Endometriosis is driven by hormonal cycles, so symptoms often improve around and after perimenopause as estrogen levels fall. But this isn't guaranteed — some people continue to have symptoms, and the hormonal shifts of perimenopause can themselves cause new or changing pelvic symptoms. Hormone therapy used for menopause symptoms can occasionally reactivate endometriosis, so it's worth flagging your history to your clinician. Any bleeding 12 or more months after your last period (postmenopausal bleeding) should always be checked promptly.
When to see a clinician
Endometriosis is common, manageable, and worth getting assessed — and these notes are educational, not a diagnosis. Speak to a clinician if:
- Period or pelvic pain is severe or life-limiting, or your usual painkillers aren't enough — this is not something to simply tolerate, and diagnostic delays are common, so advocate for assessment.
- You have pain with sex, bowel movements, or urination, especially around your period.
- You're struggling to conceive, or have heavy or irregular bleeding (which can lead to iron-deficiency anemia).
Seek urgent or emergency care if you have sudden, severe pelvic or abdominal pain, especially with nausea or vomiting, fever, dizziness, or fainting — this can signal a serious problem such as a ruptured cyst or ovarian torsion. If you have pelvic pain with a missed period or a positive pregnancy test, with or without bleeding, get assessed urgently to rule out an ectopic pregnancy. When in doubt, get checked — a proper evaluation is the right next step.
