When skin allergies itchy red spots, the first thing to do is to stay away from allergens, in addition to topical medication, systemic medication and other ways to relieve the symptoms. 1. Stay away from allergens: there are many factors that can cause skin allergies, such as dust mites, cat hair, dog hair, ultraviolet rays, etc., you can go to the hospital for allergen screening, and pay attention to avoid allergen contact. 2. Topical medication: You can use topical antipruritic agents such as glycerine lotion, zinc oxide ointment, etc. You can also use topical glucocorticoid creams such as mometasone furoate cream and hydrocortisone butyrate cream. If the allergy occurs in thin and tender parts of the skin, such as the face and armpits, it is recommended to use calcium-modulated phosphatase inhibitors such as pimecrolimus ointment and tacrolimus ointment. 3. Systemic medication: When itching is obvious, oral antihistamines such as loratadine and cetirizine can be combined. If the condition is serious, you can also take a short-term oral dose of hormones such as prednisone. Skin allergies itching red spots, it is recommended to go to the hospital, under the guidance of the doctor reasonable use of medication, to avoid improper use of medication to cause adverse consequences.