Erythema on the chest without pain or itching may be caused by cherry angioma, thrombocytopenic purpura and spider nevus, etc. It is suggested that patients should take physical therapy, medication and other ways to improve. 1. Cherry hemangioma: the painless and itchy erythema on the chest may be caused by cherry hemangioma, patients should pay attention to the lesion area, avoid scratching, external collision and extrusion of the affected area. If patients feel that it affects aesthetics or have the need to remove the lesion, they can take freezing, electrocoagulation and laser treatment, which can improve the epidermal symptoms. 2. Thrombocytopenic purpura: chest erythema painless and itchy may be triggered by thrombocytopenic purpura, patients can follow the doctor’s instructions for injection of immunoglobulin, rituximab and other drugs to help regulate the immune function of the body. 3. Spider nevus: Spider nevus may cause chest erythema without pain and itchiness, if you think it affects the aesthetics, you can follow the doctor’s instructions to improve the use of lasers, electro-ionization, freezing and other treatments, which can destroy the affected tissues and improve the skin symptoms. The causes of chest erythema without pain and itchiness are not one, it is recommended that patients seek medical examination to clarify the cause of the disease, and cooperate with doctors for standardized treatment.