At present, dermatomyositis is difficult to cure, it is recommended to follow the doctor’s instructions to standardize the treatment. Dermatomyositis is an idiopathic inflammatory myopathy with characteristic skin changes, the cause and pathogenesis of which have not yet been elucidated. Current research suggests that dermatomyositis is difficult to cure and requires long-term medication to control the active state of the disease. Dermatomyositis patients generally need glucocorticoid treatment, such as methylprednisolone, etc. If the effect of glucocorticoid is not good, it can be combined with methotrexate and other immunosuppressant treatment. The treatment of dermatomyositis should be individualized, taking into account the patient’s age, subtype of dermatomyositis, severity of the disease and co-morbidities. If the diagnosis of dermatomyositis is confirmed, it is recommended to go to the rheumatology and immunology department of a regular hospital and follow the doctor’s instructions to standardize the treatment, do not self-medication.