Skin allergies on the face are red, swollen and itchy, and should be treated by staying away from allergens, topical medication and oral medication. 1. Stay away from allergens: For symptoms caused by allergies, the first thing you should do is to identify the allergens, and then stay away from allergens, avoid using allergy-inducing cosmetics or eating allergy-inducing foods. 2. Local medication: local medication should be based on the specific severity of the selection of appropriate drugs, mainly glucocorticoid drugs, mild can choose tacrolimus, pimecrolimus, etc., the symptoms of serious use of hydrocortisone, dexamethasone, trimethoprim and other ointment coated. 3. Oral medication: the simple use of topical medication is not effective, the itching is more serious, but also oral antihistamine drugs, such as cetirizine, loratadine. Skin allergies on the face of red swelling and itching, under the guidance of the doctor to choose the appropriate method of treatment, if you need to use drugs, should be used in accordance with medical advice.