Patients with itchy face may be related to physiologic factors, such as dry skin, or pathologic factors, such as dermatologic diseases and systemic diseases. 1. Physiological factors: when the patient is in a dry environment for a long time, or the sebaceous gland secretion is reduced, the water content is decreased, the sebaceous membrane is damaged to some extent, resulting in dry skin, some tingling and itching sensation may occur. 2. Pathologic factors: (1) Skin diseases: patients suffering from skin diseases, especially allergic diseases, such as eczema, contact dermatitis, urticaria, etc., may also cause itchy face and red rash. (2) Systemic diseases: Some multi-systemic diseases may cause itchy skin, such as diabetes mellitus, hypothyroidism, chronic hepatitis, chronic nephritis, etc., but usually not only facial itching, but also may be accompanied by itching in other parts of the body, as well as other systemic abnormalities. It is recommended that patients seek timely medical examination to clarify the cause of the disease and then carry out targeted treatment; in life, patients should pay attention to skin care, and try to avoid re-exposure to irritating substances; pay attention to monitoring the condition, if the condition worsens or is accompanied by other uncomfortable symptoms, it is necessary to consult a doctor in a timely manner.