The cause of ulcerative colitis is unknown. It may be caused by an abnormal response by the body's Reference immune system Opens New Window to normal intestinal bacteria. Disease-causing bacteria and viruses also may play a role.
Ulcerative colitis can run in families.
|By:||Reference Healthwise Staff||Last Revised: Reference October 8, 2012|
|Medical Review:||Reference E. Gregory Thompson, MD - Internal Medicine
Reference Peter J. Kahrilas, MD - Gastroenterology