Cause
The underlying cause of JDM is unknown. It most likely has a genetic component, as other auto-immune disease tend to run in the families of patients. The disease is usually triggered by a condition that causes immune system activity that does not stop as it should, but the trigger is almost certainly not the cause in most cases. Common triggers include immunizations, infections, injuries, and sunburn.
Read more about this topic: Juvenile Dermatomyositis