Ulcerative Colitis

(UC; Colitis, Ulcerative)


Ulcerative colitis (UC) is a type of severe, chronic inflammatory bowel disease (IBD), which causes:
  • Inflammation in the lining of the colon and rectum
  • Ulcers in the lining of the colon and rectum
  • Bleeding in the lining of the colon and rectum
Ulcerative Colitis
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The exact cause is unknown. A virus or bacteria may cause the immune system to overreact and damage the colon and rectum.

Risk Factors

Having a family member with IBD (includes UC and Crohn's disease) may increase your risk of developing UC.


UC may cause:
  • Diarrhea
  • Abdominal cramps and pain
  • Rectal bleeding
  • Anemia
  • Weight loss
  • Fatigue, weakness
  • Nausea
  • Fever
  • Skin rashes
  • Arthritis
  • Eye inflammation, such as uveitis
Intestinal complications of UC may include:
  • Perforation
  • Fistula—abnormal passageway between 2 bodily structures
  • Obstruction
  • Excess bleeding
  • Toxic megacolon—a potentially life-threatening condition when the colon severely expands, which may result in reduced blood flow
Other complications of UC may include:

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