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Juvenile Idiopathic Arthritis - Cause

The cause of juvenile idiopathic arthritis (JIA) isn't well understood. Most experts believe it is caused by a combination of things, including:

  • An immune system that is too active and attacks joint tissues.
  • Viruses or other infections that cause the immune system to attack joint tissues.
  • Having certain genes that make the immune system more likely to attack joint tissues.

    This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http:// cancer .gov or call 1-800-4-CANCER.

    WebMD Medical Reference from Healthwise

    Last Updated: January 30, 2014
    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.
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