Treatment of immune system disorders leading to dermatomyositis consists mainly of immunotherapy and symptomatic supportive therapy. Dermatomyositis is a non-suppurative inflammatory disease involving the transverse striated muscle with a predominantly lymphocytic infiltrate, which can be triggered by autoimmune system disorders. 1.Immunotherapy: (1) Glucocorticosteroids, such as prednisone and methylprednisolone, etc. The dosage of hormones is adjusted according to clinical symptoms, serum myosin enzyme measurements, and related inflammatory indicators. (2) Immunosuppressants including cyclophosphamide, azathioprine, etc., during the use of patients need to closely monitor the liver and kidney function, blood routine, etc., to be alert to the emergence of drug toxic side effects. (3) Hydroxychloroquine: when the rash is severe, it can be used together with hormones. (4) Others: High-dose gammaglobulin can be used intravenously in critical cases. In addition, for patients with poor results of hormone and immunosuppressant treatment, biologic agent treatment can also be considered. 2. Symptomatic supportive treatment: including physical therapy, such as passive exercise, prevention and treatment of muscle spasm, massage, electrotherapy and other methods can be used to prevent muscle atrophy. At the same time, pay attention to adequate nutritional support. If patients consider dermatomyositis, it is recommended to seek timely medical treatment, and drugs should be used under the guidance of specialized doctors.