Itchy body on hot days, may be related to atopic dermatitis, prickly heat, sweat herpes and other factors, after diagnosis is mainly with medication, the cause of the disease is different, the use of drugs is also different. 1. Contact dermatitis: For contact dermatitis, topical glycerite lotion, tacrolimus ointment and other medications can be used to improve the discomfort, and with oral anti-allergy medication, such as cetirizine and loratadine. 2. Prickly heat: If prickly heat is the cause of itchy body on hot days, you can be instructed by your doctor to apply glycerine lotion to relieve itchy skin. For severe symptoms, antihistamines such as cetirizine and loratadine can be used to reduce skin inflammation and relieve clinical symptoms. 3. Sweat herpes: can be used externally with glycerine lotion, tacrolimus ointment and other medications to relieve itching, swelling and other symptoms, but also conducive to the disappearance of blisters, but also with oral antihistamine therapy, such as loratadine, cetirizine. Itchy body on hot days, if the symptoms continue to be unable to get better, you should seek medical attention in time, after clarifying the cause of the disease, by the doctor’s guidance for treatment and conditioning.