Frequent itching of the face may be caused by seborrheic dermatitis, contact dermatitis, facial eczema and so on. 1. Seborrheic dermatitis: a common chronic inflammatory skin disease, occurring in sebum secretion parts, such as the head, face, etc., mainly manifested in the affected areas of the skin itching, erythema, follicular pimples and dandruff and other symptoms. It can lead to frequent itching of the face. 2. Contact dermatitis: refers to the acute or chronic inflammatory reaction that occurs after the skin comes into contact with certain exogenous substances. For example, patients who are allergic to cosmetics or skin care products, the use of which can lead to localized skin itching, swelling, burning sensation and other symptoms, thus leading to frequent itching of the face. 3. Facial eczema: is caused by a variety of internal and external factors of a kind of skin inflammatory reaction, if it occurs in the face, can cause facial itching, can also be accompanied by facial papules, papules, blisters and other symptoms, which can also lead to the face often itchy. There are many other causes of frequent itching of the face, which should be taken seriously, and timely consultation should be made to identify the cause of the disease and follow the medical advice for further treatment or therapy.