Endometriosis Explained: Symptoms, Diagnosis and Care

What endometriosis is

The womb is lined with tissue that thickens and then sheds each month as a period. In endometriosis, tissue that behaves in a similar way grows outside the womb, most often on the ovaries, the tubes, and the lining of the pelvis, and sometimes elsewhere. Each month this misplaced tissue responds to the same hormonal signals, building up and then breaking down and bleeding. Unlike a period, though, this blood has no way to leave the body. It irritates the surrounding tissue, causing inflammation, pain and, over time, scar tissue and adhesions that can stick organs together. This is why endometriosis is a whole-body condition of inflammation, not simply heavy periods.

The symptoms and their impact

The most common symptom is pain, especially painful periods that can be severe enough to disrupt work, school or daily life. Pain may also occur during or after sex, when passing urine or opening the bowels, and sometimes between periods. Other features include heavy periods, extreme tiredness, and difficulty getting pregnant, which is sometimes how the condition is first suspected. The symptoms vary enormously: some people have severe symptoms with little visible disease, while others have extensive disease with few symptoms. Crucially, period pain that regularly stops you doing normal activities is not something to simply endure. Persistent, life-limiting pain deserves proper assessment rather than being dismissed as a normal part of menstruation.

Why diagnosis often takes time

Endometriosis is notoriously slow to diagnose, often taking several years from the first symptoms. There are several reasons. Symptoms overlap with other conditions such as irritable bowel syndrome or bladder problems, painful periods are often wrongly assumed to be normal, and the only way to see the tissue directly is with keyhole surgery. Scans such as ultrasound can spot larger cysts but often look normal even when endometriosis is present, which can be falsely reassuring. Because of this, UK guidance encourages doctors to take a careful history, consider endometriosis early when symptoms fit, and not wait for a scan to be abnormal before acting. Keeping a symptom and pain diary can genuinely help your GP.

How it is diagnosed and treated

Diagnosis starts with your GP taking a detailed history and examining you, and may include an ultrasound scan. If endometriosis is suspected, you may be referred to a gynaecologist. A definite diagnosis is usually made with a laparoscopy, a keyhole operation that lets the surgeon look inside the pelvis and, if found, treat the tissue at the same time. Treatment aims to control symptoms, and no single option suits everyone. Pain relief, hormone treatments that reduce or stop periods, and surgery to remove the tissue are all options, chosen according to symptoms, whether you want to conceive, and your preferences. Fertility can often be helped, and severe cases are managed in specialist endometriosis centres.

Living with endometriosis

Endometriosis is a long-term condition, so ongoing management and support matter. Because it can affect fertility, mood, relationships and work, good care looks at the whole person. Many people find that a combination of medical treatment, pain management strategies, and support from others with the condition helps most. Charities and support groups offer valuable practical and emotional help. It is reasonable to ask about a referral to a specialist if your symptoms are not controlled, if you are struggling to conceive, or if the impact on your life is significant. The clearest message is that severe or persistent period pain is worth investigating; recognising endometriosis, even after a delay, opens the door to treatment that can transform quality of life.