M33.9: Dermatopolymyositis, unspecified
The cause of this condition is unknown. It is thought that this disorder involves the immune system producing certain substances. These substances can attack the skin and muscles.
The disorder causes a weakening of the muscles. As a result it can be very hard work just to comb your hair, for example. The inflammations in the skin can cause changes to the skin. For example, the skin may turn anything from pale red to purple, or swell up.
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