Dr. Ellen Wilson is an associate professor and gynecology specialist who treats endometriosis. Endometriosis is a painful disorder where endometrial tissue grows outside the uterus, which can lead to increased pain, scarring, and fertility issues if left untreated. Common symptoms of endometriosis include unusually painful periods, pain after intercourse, painful urination during periods, heavier periods or bleeding between periods, and pelvic pain or constipation. Women experiencing these symptoms should see a gynecologist.