The examination said it was dermatomyositis and interstitial pulmonary pneumonia. Why couldn't

Dermatomyositis patients complicated with pulmonary interstitial pneumonia, is the disease patients more common symptoms, because dermatomyositis patients often appear obvious systemic muscle soreness, weakness, arrhythmia and other symptoms, while patients with pneumonia often appear at night severe cough, neurasthenia and other symptoms, so may appear difficult to sleep at night symptoms.