Dermatomyositis Disease Information | Johns Hopkins Myositis Center
https://www.hopkinsmyositis.org/myositis/dermatomyositis/
WEBDermatomyositis is characterized by a rash that precedes or accompanies muscle weakness. The cause is unknown. The rash that accompanies the symptoms of muscle weakness looks like patchy, bluish-purple discolorations on the face, neck, shoulders, upper chest, elbows, knees, knuckles, or back.
DA: 76 PA: 75 MOZ Rank: 30