Crohn’s disease, also called regional enteritis or ileitis, is a lifelong form of inflammatory bowel disease (IBD). The condition inflames and irritates the digestive tract — specifically the small and large intestines. Crohn’s disease can cause diarrhea and stomach cramps. It’s common to experience periodic disease flare-ups. Crohn’s disease gets its name from American gastroenterologist Dr. Burrill Crohn (1884-1983). He was one of the first physicians to describe the illness in 1932. Ulcerative colitis is another commonly diagnosed IBD.