The exact cause of Crohn's disease remains unknown. Previously, diet and stress were suspected, but now doctors know that although these factors may aggravate existing Crohn's disease, they don't cause it. Now, researchers believe that a number of factors, such as heredity and a malfunctioning immune system, play a role in the development of Crohn's disease.

  • Immune system. It's possible that a virus or bacterium may trigger Crohn's disease. When your immune system tries to fight off the invading microorganism, an abnormal immune response causes the immune system to attack the cells in the digestive tract, too.
  • Heredity. Crohn's is more common in people who have family members with the disease, leading experts to suspect that one or more genes may make people more susceptible to Crohn's disease. However, most people with Crohn's disease don't have a family history of the disease.
Aug. 09, 2011

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