Dermatomyositis is a rare autoimmune myopathy disease that targets the muscles and skin. Dermatomyositis causes a characteristic skin rash on the chest, back, or arms that looks like a sunburn. It also causes muscle weakness so severe that it can be hard for some patients to do everyday things such as climbing a flight of stairs, standing up from a chair or bed, and even combing their hair. In this video series, Dr. Eleni Tiniakou, a physician at the Johns Hopkins Myositis Center, explores the s