The cause of itchy skin in summer may be summer dermatitis, prickly heat, etc., can be used externally with glycerite lotion, glucocorticoid drugs, itching significantly can take antihistamines to improve. 1. prickly heat: also known as corn rash, is due to the high temperature in summer, a large amount of sweat is not easy to evaporate, resulting in swelling of the stratum corneum, so that the sweat ducts are blocked with increased pressure, sweat duct rupture and the onset of the disease. Patients can be manifested as blisters, pimples and other skin lesions, self-conscious burning and itching, etc., can be used externally with glycerine lotion and prickly heat powder, itching severe oral antihistamine such as cetirizine treatment. 2. Summer dermatitis: due to the summer heat, hot and stuffy caused by a skin disease, the patient manifested as intense itching, lesions began as erythema, and then developed into papules, followed by herpes papules, topical medication can be chosen glycerine lotion or dexamethasone ointment and other glucocorticoid medications, internal antihistamine to improve the itching. If itchy skin occurs in summer, it is recommended to go to a professional hospital for treatment and use medication under the guidance of a doctor.