Repeated allergic itching of the face may be caused by food or contact substances, which can be treated by treating the cause and symptomatic treatment. 1. Treatment of the cause: If you have eaten certain foods such as mango, lobster, crab, etc., or come into contact with allergic substances, causing recurrent allergic itching of the face. It is recommended to go to the hospital in time to find the cause of the allergy. If it is a food allergy, try to avoid eating this kind of food again. If you are allergic to a certain ingredient, you should avoid contacting the allergen again to minimize the allergic reaction. 2. Symptomatic treatment: Generally after the occurrence of skin allergic reactions, it is recommended to take appropriate oral anti-allergy drugs, anti-allergy treatment, such as cetirizine, loratadine and so on. At the same time, the use of external medication, such as glycerite lotion, can play a role in stopping the itching. If the face is repeatedly allergic to itching, pay attention to diet, keep the skin clean, and timely medical attention to clarify the allergens, under the guidance of the doctor to use drugs.