If the patient has dryness of the face and allergic symptoms, it may be dry seborrheic dermatitis of the face. Once this disease occurs, it may cause local dryness of the skin and produce certain scales, and there may be significant itching or inflammatory erythema. This phenomenon may be related to the excessive overflow of sebum from the skin, and some people may have a secondary infection, especially oval furfuraceous infection may cause this phenomenon, due to the recurrence of inflammation may cause local dryness, because local dryness may be accompanied by obvious scaling, and patients mostly also produce a certain itch.