There is no fastest way to relieve skin allergies and redness, but you can take general treatment, medication and other ways to relieve it. 1. General treatment: patients with skin allergies and redness should stay away from allergens, avoid re-exposure, and should not excessively wash and scratch the affected area to avoid aggravation. 2. Drug treatment: patients can follow the doctor’s instructions for external glucocorticoid drugs, with anti-inflammatory, anti-allergic and erythema, such as mometasone furoate ointment, or external tacrolimus and other calcium-modulated neural phosphatase inhibitors. If accompanied by itching, you can follow the doctor’s prescription oral antihistamines, such as cetirizine, loratadine, etc., can be effective anti-allergy, relieve the symptoms of itchy skin. If the skin allergy redness, it is recommended to go to the regular hospital, with the doctor standardized treatment.