Ulcerative colitis (UL-sur-uh-tiv koe-LIE-tis) is an inflammatory bowel disease (IBD) that causes inflammation and ulcers (sores) in your digestive tract. Ulcerative colitis affects the innermost lining of your large intestine, also called the colon, and rectum. In most people, symptoms usually develop over time, rather than suddenly.
Ulcerative colitis can be draining and can sometimes lead to life-threatening complications. While it has no known cure, there are several new treatments that can greatly reduce signs and symptoms of the disease and bring about long-term remission.