How does endometriosis cause dysmenorrhea?

Endometriosis causes dysmenorrhea because the endometrial tissues respond to menstrual hormones and thicken just like endometrial tissue inside the uterus.  As a result pain from endometriosis is much worse during the menstrual period.

Endometriosis is a medical condition where uterine tissue begins to grow outside the uterus, like the ovaries or the fallopian tubes. The abnormal uterine tissue continues to behave as if it were part of the uterus, responding to monthly changes in hormone levels that cause menstruation. This abnormal growth can lead to painful bleeding outside the uterus before, during, and after menstruation. This intense pain and cramping is secondary dysmenorrhea, or painful menstruation caused by an underlying gynecological condition. Anti-inflammatory medication and hormonal treatments may help relieve secondary dysmenorrhea. In severe cases, the abnormal uterine tissue may need to be surgically removed.

Continue Learning about Endometriosis


Are you one of seven million women in the United States with endometriosis? If so, you may also be struggling with infertility. Endometriosis is a female reproductive disorder characterized by pelvic pain, inflammation and vaginal ...

bleeding. This painful condition can affect any female of menstruating age, although it is more likely to run in families. If you experience abnormal bleeding or pelvic pain, talk to your doctor. While there is no known cause, and no known cure for endometriosis, treatments do exist, including medications and surgery to reduce symptoms and restore fertility.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.