The phenomenon of red face like allergy may be caused by solar dermatitis, allergy to toiletries, lupus erythematosus and other diseases. 1. Solar dermatitis: If the patient has been over-exposed to ultraviolet light, and then appear like an allergy to redness on the face, should be considered to be caused by solar dermatitis, the patient will also have localized burning and tingling sensation, such people should avoid the face of the sun again, can follow the doctor’s instructions for the local use of topical glycerin lotion. 2. Allergy to toiletries: if the patient after the use of toiletries like an allergic red face, it should be considered toiletries caused by allergies, should avoid using again, you can follow the doctor’s instructions oral loratadine anti-allergy treatment. 3. Lupus erythematosus: if the patient in the bridge of the nose and both sides of the zygomatic region of the appearance of red spots similar to the shape of the butterfly, should be considered to be caused by lupus erythematosus, this kind of patients may also have kidney, joints, need to go to the hospital to clarify the cause of the disease, diagnosis in the doctor’s guidance to use ibuprofen, hydroxychloroquine, and other medicines to carry on the treatment. If the face is red like an allergic phenomenon, it is recommended that the patient go to the hospital to clarify the cause of the disease, and then follow the doctor’s instructions for treatment.