The red spots on the body are itchy, which is considered to be dermatitis caused by allergy, and can be treated by the following methods: 1. using antihistamines, such as loratadine tablets, levocetirizine hydrochloride tablets, epinephrine hydrochloride tablets, cimetidine tablets, etc.; 2. using corticosteroids, such as prednisone acetate tablets, dexamethasone sodium phosphate injection, tretinoin injection, etc.; 3. using proprietary Chinese medicines, such as skin itch granules, moistening and antipruritic capsules, yupingfeng granules, etc.; 4, use other drugs, such as vitamin C, calcium gluconate, compound glycopyrrolate tablets, etc.; 5, apply topical drugs, such as topical mometasone furoate cream, boric acid zinc oxide ice cream, tacrolimus ointment, dehumidification and antipruritic ointment, etc.