Ulcerative colitis is one of the illnesses known as inflammatory bowel disease (IBD). In ulcerative colitis, the inner lining of the large intestine or bowel (colon) and the rectum become inflamed (irritated or raw and swollen). The colon becomes ulcerated, causing bleeding.

Ulcerative colitis can affect the entire colon, but it is usually in the rectum and the lower part of the colon. Swelling from ulcerative colitis can make the colon empty often, which causes diarrhea.

Gastrointestinal Tract

About 1.4 million Americans have inflammatory bowel disease.  IBD is more common in Caucasians.  People of all age groups can get ulcerative colitis, but it usually begins between the ages of 15 and 30. Ulcerative colitis affects males and females equally.