The care of polymyositis is as follows. Polymyositis is a syndrome characterized by interstitial inflammation and degeneration of muscle fibers in skeletal muscles caused by a variety of reasons. The lesions are called polymyositis if they are confined to the muscles and dermatomyositis if they also involve the skin. Multiple myositis may be complicated by sudden death, aspiration, lung infection and other complications, in the nursing process, we should pay attention to observe whether the patient has breathing abnormalities, closely observe the condition, make good preparations for resuscitation, to prevent the occurrence of aspiration, the respiratory tract should be ensured to ensure that the smooth, to promote the patient to cough up sputum effectively, not to occur respiratory obstruction, and to do a good job to ensure the effective safety and prevent the occurrence of traumatic injuries. Help patients to understand the role of drugs and side effects, and instruct patients to follow the doctor’s instructions in taking hormone therapy, and not to reduce the dose or stop the drug on their own. When taking immunosuppressant drugs, monitor the blood picture, and use immunoglobulin and plasma replacement when necessary. Consider the patient’s economic capacity, do a good job of explaining, to avoid causing excessive psychological pressure on the patient. To do a good job of health education, patients should pay attention to maintain an optimistic attitude, so that patients and their families understand the relevant knowledge of polymyositis, treatment goals, reduce anxiety, usually pay attention to adequate sleep, avoiding exertion. In terms of diet, attention should be paid to more dietary high protein, high calorie food.