It is currently believed that dermatomyositis is generally not self-healing and requires standardized drug therapy to control the disease. Dermatomyositis is an autoimmune disease mainly characterized by skeletal muscle involvement, and its development may be related to autoimmunity, infection, tumor, genetics and so on. It is currently believed that dermatomyositis is generally not self-healing and requires standardized drug therapy to control the condition. Dermatomyositis drug therapy treatment mainly uses glucocorticoids and immunosuppressants, hormones are generally used in large doses or even shock therapy, such as methylprednisolone, etc., and the most commonly used immunosuppressants are methotrexate and azathioprine. Most patients can recover well after treatment, and some patients can be stabilized after stopping hormones or even all drugs. In addition, patients in the acute stage should pay attention to bed rest, avoid sun exposure, pay attention to warmth, prevent infection, and strengthen nutrition; in the chronic stage, strengthen functional exercise. Prevention of recurrence is the key to improve the prognosis of patients, it is recommended not to stop the medication on their own, follow the doctor’s instructions to gradually reduce the dosage, follow up on time, monitor the condition, and once there are signs of recurrence of the disease, consult a doctor to adjust the treatment program.