With endometriosis, fragments of the uterine lining (endometrium) are deposited elsewhere in the body – typically in or on the Fallopian tubes, on the ovaries, behind the uterus, or on the bowel, bladder or pelvic wall, but sometimes in abdominal scars or even the lungs.
Endometriosis can begin at any time from the onset of menstruation to the menopause. You are more at risk if you have a family history, a menstrual cycle shorter than 28 days and if your periods last more than a week. The main symptom is pelvic pain. Other endometriosis symptoms include bloating, fatigue, painful periods, painful sex, painful bowel movements, constipation, painful and frequent urination or blood in the urine during periods, and infertility.