Overview

Ischemic colitis occurs when blood flow to part of the large intestine (colon) is temporarily reduced, usually due to constriction of the blood vessels supplying the colon or lower flow of blood through the vessels due to low pressures. The diminished blood flow doesn't provide enough oxygen for the cells in your digestive system, which can result in tissue damage to the affected area of intestine.

Any part of the colon can be affected, but ischemic colitis most commonly causes pain on the left side of the belly area (abdomen).

Ischemic colitis can be misdiagnosed because it can easily be confused with other digestive problems. You may need medication to treat ischemic colitis or prevent infection, or you may need surgery if your colon has been damaged. Most often, however, ischemic colitis heals on its own.