Ulcerative colitis (UC) is a chronic inflammatory bowel disease (IBD) causing inflammation and ulcers in the lining of the large intestine (colon and rectum), leading to symptoms like bloody diarrhea, abdominal pain, urgency, fatigue, and weight loss, with diagnosis via colonoscopy and blood/stool tests; treatments focus on controlling inflammation with medications (anti-inflammatories, immunosuppressants, biologics) and sometimes surgery, aiming for remission and a normal life, though it's a lifelong condition. - @medical8220