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Genetic and Rare Diseases Information Center (GARD)

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What causes dermatomyositis?

The cause of this disorder is unknown. It is theorized that an autoimmune reaction (reactions caused by an immune response against the body's own tissues) or a viral infection of the skeletal muscle may cause the disease.[1] In addition, some doctors think certain people may have a genetic susceptibility to the disease.[2]
Last updated: 8/26/2013

  1. Moskowitz RJ. Dermatomyositis. MedlinePlus. February 2011; Accessed 8/26/2013.
  2. Dermatomyositis. July 2011; Accessed 8/26/2013.