The itchy skin on the face is considered to be pityriasis alba, allergy, solar dermatitis and so on. 1. white chaff rash: this is a kind of clear hypopigmented spots that occur in the face, the pathogenesis is not particularly clear, consider and microbial infection related, the onset of the early stage of erythema, part of no self-conscious symptoms, and part of a slight itching. 2. Allergy: Allergy is a kind of metamorphic reaction, which is mainly a reaction of the human body to certain normal substances. If the patient is allergic, there will be vasodilatation and increased exudation after contacting allergens, which will also be manifested as itching. 3. Solar dermatitis: this is due to intense sunlight exposure after exposure to the skin of the acute phototoxic reaction, the skin receives excessive ultraviolet radiation, the cellular proteins and nucleic acids absorb a large number of ultraviolet light to produce complex photobiochemical reactions, resulting in necrosis of the epidermal cells, so the release of some of the active mediators, resulting in the expansion of the skin’s vasculature, tissue edema, a series of symptoms. Itchy skin on the face of more reasons, may also be psoriasis, acute and chronic eczema, etc., in the case of mental tension and anxiety, can also cause itchy skin, it is recommended to go to the hospital for a detailed examination, for the cause of the symptomatic treatment.