Crohn's disease, regional enteritis, regional ileitis - a serious chronic and progressive inflammation of the ileum producing frequent bouts of diarrhea with abdominal pain and nausea and fever and weight loss

irritable bowel syndrome, mucous colitis, spastic colon - recurrent abdominal pain and diarrhea (often alternating with periods of constipation); often associated with emotional stress

ulcerative colitis - a serious chronic inflammatory disease of the large intestine and rectum characterized by recurrent episodes of abdominal pain and fever and chills and profuse diarrhea

inflammation, redness, rubor - a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat