Dermatomyositis is an autoimmune disease, whether it will recur in 2~3 years varies from person to person, there is no specific data, not most people will recur. The development of dermatomyositis is related to autoimmunity, infection, tumor, genetics and other factors. Dermatomyositis is mainly treated by glucocorticoids, such as prednisone, immunosuppressants, such as cyclophosphamide, azathioprine and other drugs. About 90% of the patients can improve after treatment, and some of them can not recur after treatment, but there may be stabilized and then reappear muscle weakness, muscle enzyme elevation and so on, usually need to re-assess the disease and treatment. Dermatomyositis patients are advised to go to the rheumatology and immunology department of regular hospitals in time and follow the doctor’s instructions for standardized treatment.