ulcerative colitis is an inflammatory bowel disease of the colon (also called the large intestine) and rectum that causes inflammation and ulcers of the intestinal wall diarrhea and abdominal pain. crohn’s disease is also an inflammatory bowel disease with similar symptoms but it can affect any part of the digestive tract. irritable bowel syndrome is not an inflammatory bowel disease. it is a milder disorder without damage or inflammation of the intestinal lining.
what’s the difference between ulcerative colitis crohn’s disease and irritable bowel syndrome?