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What is ulcerative colitis?

Ulcerative colitis (UC) is a condition that affects the digestive system, also known as the gut. UC causes damage to the large bowel. The immune system usually protects the body from infections by fighting germs and other harmful invaders. In ulcerative colitis, the immune system mistakes the gut for germs and attacks it. This causes inflammation in the gut, which makes it sore, red and swollen. Small sores called ulcers can develop on the walls that line the large bowel. Sometimes these ulcers bleed or make pus.

Continue Learning about Ulcerative Colitis

Ulcerative Colitis: Topics to Discuss at Your Next Appointment
Ulcerative Colitis: Topics to Discuss at Your Next Appointment
Ulcerative colitis (UC) is one of the two main types of inflammatory bowel disease (IBD). If you are living with UC, it is important to seek treatment...
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Do people with ulcerative colitis (UC) always have severe symptoms?
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Are there alternative treatments for ulcerative proctitis?
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What Is Ulcerative Colitis?
What Is Ulcerative Colitis?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.