Dermatomyositis is a rare inflammatory disease that primarily affects the skin and muscles. It is characterized by a distinctive rash, often appearing on the face, neck, and back, along with muscle weakness. The exact cause is unknown, but it is believed to involve an autoimmune response, where the body's immune system mistakenly attacks its own tissues. Diagnosis typically involves a combination of clinical evaluation, blood tests for muscle enzymes, and imaging studies. Treatment often includes corticosteroids and other immunosuppressive medications to reduce inflammation and improve muscle strength. Early intervention can help manage symptoms and improve quality of life.