Colitis is swelling (inflammation) of the large intestine (colon).
Most of the time, the cause of colitis is unknown.
Causes of colitis include:
Symptoms can include:
The health care provider will perform a physical exam. You will also be asked questions about your symptoms, such as:
The provider can diagnose colitis by inserting a flexible tube into the rectum (flexible sigmoidoscopy or colonoscopy) and looking at certain areas of the colon. You may have biopsies taken during this exam. Biopsies may show changes related to inflammation. This can help determine the cause of colitis.
Other studies that can identify colitis include:
Your treatment will depend on the cause of the disease.
The outlook will vary, depending on the cause of the problem.
Complications may include:
Call your provider if you have symptoms such as:
Reviewed By: Michael M. Phillips, MD, Clinical Professor of Medicine, The George Washington University School of Medicine, Washington, DC. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.