Ulcerative colitis: MedlinePlus Medical Encyclopedia

Ulcerative colitis is a condtion in which the lining of the large intestine (colon) and rectum become inflamed.

Ulcerative colitis is a form of inflammatory bowel disease (IBD). Crohn's disease is a related condition.

The cause of ulcerative colitis is unknown. People with this condition have problems with the immune system. However, it is not clear if immune problems cause this illness. Stress and certain foods can trigger symptoms, but they do not cause ulcerative colitis.

Ulcerative colitis may affect any age group. There are peaks at ages 15 - 30 and then again at ages 50 - 70.

The disease can begin the rectal area. It may involve the entire large intestine over time. It may also start in the rectum and other parts of the large intestine at the same time.

Risk factors include a family history of ulcerative colitis, or Jewish ancestry.

The symptoms can be more or less severe. They may start slowly or suddenly. About half of people only have mild symptoms. Others have more severe attacks that occur more often. Many factors can lead to attacks.

Symptoms include:

Children's growth may slow.

Other symptoms that may occur with ulcerative colitis include the following:

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Ulcerative colitis: MedlinePlus Medical Encyclopedia