In rare cases a bowel disease can lead to complications. In Crohn's disease intestinal obstruction is a possible complication that must be treated immediately. The formation of scars after a relapse can lead to constrictions which, in the worst case, can lead to intestinal obstruction. It is also possible that intestinal rupture may occur, in which the intestinal contents enter the abdominal cavity and can trigger life-threatening infections. In such emergencies, you must seek immediate hospital treatment.Complications are also conceivable with ulcerative colitis. Not only can intestinal perforation occur, but also a toxic megacolon. This in turn can lead to a life-threatening intestinal obstruction. Strong attacks can also lead to bleeding in the intestine, which can lead to severe blood loss. In this case, blood transfusions and surgery may be necessary.