The face is always allergic to itch, consider contact dermatitis, eczema, photodermatitis and other diseases, should be based on the cause of treatment. 1. Contact dermatitis: contact dermatitis can be caused by contact with allergens on the skin of the face, which can cause the face to always be allergic to itching. Patients should avoid re-exposure to allergy-causing substances, use glucocorticoid creams such as hydrocortisone cream as prescribed by the doctor, and take antihistamine drugs such as loratadine and cetirizine orally. 2. Eczema: This disease is an inflammatory disease of the skin of the face caused by internal and external factors, which can lead to the face is always allergic to itch. If the lesions appear oozing, can be used externally with boric acid solution wet compresses, no oozing after the external use of hydrocortisone cream and other glucocorticoid cream, can also be taken orally antihistamine drug therapy. Eczema patients in serious condition, can be prescribed systematic application of prednisone, methylprednisolone and other glucocorticoid drugs, cyclosporine, methotrexate and other immunosuppressants and other drug therapy. 3. Photodermatitis: This disease is caused by the patient’s allergy to ultraviolet light. Patients should pay attention to sunscreen, oral chlorpheniramine maleate, cetirizine, ibastine and other antihistamines, can also be prescribed to take niacinamide, hydroxychloroquine and other drugs to improve symptoms. The face is always allergic to itch may also be caused by other diseases, it is recommended that patients go to the hospital in time for examination, after a clear diagnosis under the guidance of the doctor standardized treatment, all drugs should be used under the guidance of a professional doctor.