NHS information about ulcerative colitis, a long-term condition that affects your large bowel (colon). Read about symptoms, flare-ups, how it's treated and things you can do yourself to help. Ulcerative colitis (UC) is the most common type of inflammatory bowel disease (IBD). It affects the inner lining of the colon and rectum, causing complete damage to the lining. People with UC often experience blood or mucous in their stool (poop) and feel an urgent need to empty their bowels. Ulcerative colitis (UC) is one of the two types of inflammatory bowel disease (IBD), with the other type being Crohn's disease. [1] It is a long-term condition that results in inflammation and ulcers of the colon and rectum. [1][7] The primary symptoms of active disease are abdominal pain and diarrhea mixed with blood (hematochezia). [1] Ulcerative colitis (UC) is a lifelong condition that causes inflammation and ulcers inside your colon (large intestine). UC is one of the most common types of inflammatory bowel disease (IBD), alongside Crohn’s disease. Read about ulcerative colitis symptoms, including early warning signs, intestinal and extraintestinal effects, and when to seek medical help. Ulcerative colitis is a chronic inflammatory bowel disease (IBD) that causes inflammation and ulcers in the lining of the large intestine (colon) and rectum. The inflammation typically begins in the rectum and extends continuously into the colon. In this video, we'll cover the basics of ulcerative colitis. What is it? Who gets it? The symptoms, diagnosis, and treatment. Whether you're looking for answers for yourself or someone you love, we're here to give you the best information available. Ulcerative colitis (UC) is an inflammatory bowel disease. It causes irritation, inflammation, and ulcers in the lining of your large intestine (also called your colon). Learn about the symptoms and treatment of ulcerative colitis, a chronic disease that causes inflammation and ulcers on the inner lining of the large intestine. Learn more about the diagnosis and treatment of Ulcerative colitis. Find tips to get ready for any appointments you need.