the cause of crohn's disease is unknown. studies suggest that this and other inflammatory bowel diseases may result from an abnormal response by the body's immune system to normal intestinal bacteria. 1 disease-causing bacteria and viruses also may play a role in causing the condition. crohn's disease can run in families so some people may be more likely than others to develop the condition when exposed to something that triggers an immune reaction. environmental factors may also play a role in causing the disease. webmd medical reference from healthwise this information is not intended to replace the advice of a doctor. healthwise disclaims any liability for the decisions you make based on this information. © 1995-2011 healthwise incorporated. healthwise healthwise for every health decision and the healthwise logo are trademarks of healthwise incorporated.
what causes crohns disease?