The redness and itchiness of the face always recurring allergies should be searched for and circumvented to avoid re-exposure to the allergens, otherwise the symptoms of allergy will persist or even be acutely aggravated. It can be treated by anti-allergy and anti-inflammatory methods. 1. Finding and avoiding allergens: Pay attention to the skin care products and cosmetics used, as well as the food, medicines, external environment and other substances suspected of being allergic, and stop using these products in time. 2. Anti-allergy treatment: If pimples and erythema appear, a small amount of local short-term application of weak hormone ointment can be used to control allergy symptoms. Calcium-modulated phosphatase inhibitors, such as tacrolimus, can also be used topically. If the redness and swelling are obvious, accompanied by oozing, first use boric acid solution wet compresses for astringency, swelling, and if necessary, you can use anti-allergy drugs such as antihistamines such as cetirizine. If the face is always repeatedly allergic to redness and itching, should be timely medical treatment, the relevant drugs should be used under the guidance of the doctor.