Itchy rash on the body may be caused by urticaria, papular urticaria, ringworm, etc., which can be treated by topical medication or oral medication. 1. Urticaria: the cause of urticaria may be food, drugs, dust, etc., patients need to stay away from sensitizers, and then oral antihistamine drugs such as loratadine, levocetirizine hydrochloride tablets, etc., and at the same time apply glycerine lotion, etc. to stop itching, use to avoid skin irritation and other adverse reactions. 2. Papular urticaria: Most of them are caused by mosquito bites. Glucocorticoid ointment can be used externally, such as dinexed cream, itching is intense, oral antihistamine drugs such as loratadine and other treatments. 3. ringworm: patients with fungal skin infections will also appear skin rash, itching symptoms, good in the more hidden parts of the body, such as the inner thighs, vulva, etc., can be used externally naftifine ketoconazole cream and other medicines need to carry out antifungal treatment. Itchy rash may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor treatment, avoid unauthorized use of drugs.