Dermatomyositis can not be cured, even if the internal organs of patients with dermatomyositis are not damaged, but also can not be cured, patients comply with the doctor’s advice to actively standardize the diagnosis and treatment, can slow down the progress of the disease, and the disease will be controlled in a stable range. Dermatomyositis is a kind of autoimmune connective tissue disease that involves the skin and the transverse striated muscle, with subacute and chronic onset. It usually involves both skin and muscle lesions, but can also present as a single lesion. There is currently no measure to completely eradicate dermatomyositis. Its clinical features are symmetrical weakness of proximal limb muscles, neck muscles, pharyngeal muscles, muscle tenderness and elevated serum myosin, which may involve other organs or tissues such as lungs, heart, joints and blood vessels. It may be combined with autoimmune diseases or tumors. In severe cases, interstitial lung lesions, lung infections, respiratory muscle weakness, resulting in life-threatening respiratory failure. Dermatomyositis internal organs are not damaged, indicating that the disease is in the initial stage or the degree of the disease is relatively mild, at this time, dermatomyositis is mainly manifested as a rash on the limbs and so on, and did not have in-depth development of the organs involved in the internal organs, such as the patient to grasp the opportunity for treatment, timely and standardized diagnosis and treatment can be to control the condition, and help to slow down the progression of the disease. If dermatomyositis does not involve internal organs damaged people do not pay attention to the treatment, and not actively standardized diagnosis and treatment, the condition will further develop, serious cases can be due to interstitial lung lesions, lung infection, respiratory muscle weakness and other complications, resulting in respiratory failure and life-threatening. If there is any discomfort related to dermatomyositis, it is recommended that the patient consult a doctor in a timely manner and follow the doctor’s instructions to standardize the diagnosis and treatment in order to slow down the progress of the disease.