Inflammatory Bowel Disease/ Crohn's Disease Inflammatory bowel disease (IBD) is a group of chronic disorders that cause inflammation or ulceration in the small and large intestines. Most often IBD is classified as ulcerative colitis or Crohn's disease but may be referred to as colitis, enteritis, ileitis, and proctitis. Ulcerative colitis causes ulceration and inflammation of the inner lining of a couple of really bad places, while Crohn's disease is an inflammation that extends into the deeper layers of the intestinal wall. Ulcerative colitis and Crohn's disease cause similar