Facial allergy erythema is generally the patient’s face after contact with some of their own allergic substances appear erythema, edema with itching performance, mainly through drug treatment, general treatment and other ways to relieve. 1. Drug treatment: patients can take oral antihistamine drugs such as loratadine, imipramine, benzylamine, etc., acute or severe symptoms can be treated with hormonal drugs such as prednisone, dexamethasone, etc.. 2. General treatment: patients should try to find the cause of the disease, avoid contact with allergenic and irritating foods, and avoid external stimuli. If the face appears allergic to the symptoms of redness and swelling, you should go to the hospital in time, give targeted treatment, under the guidance of the doctor to use the appropriate drugs for treatment, do not blindly take drugs.