With endometriosis, deposits of tissue that act just like the tissue lining the uterus develop outside the uterus. This tissue thickens, breaks down, and bleeds with each period. But the blood has no way to leave the body and becomes trapped.


Painful periods can happen with endometriosis. There may be heavy bleeding or pain during sex or when having a bowel movement or urinating. Having trouble getting pregnant is also common with endometriosis.


Pain medication and hormone therapy may ease symptoms. Minor surgery to remove endometriosis deposits can help with fertility problems. It can also help in cases of severe pain.