How long does ulcerative colitis last?

Ulcerative colitis is a chronic, non-specific inflammatory disease of the intestine. It has a long course of disease, mainly involving the rectum and colon, and may occur repeatedly. Ulcerative colitis deterioration can cause toxic megacolon, may also cause intestinal bleeding, acute intestinal perforation and other complications, extensive colitis, early onset and longer course, long time may appear rectal, colon cancer.