Causes of numbness and itchiness in the face include allergic reactions, intracranial disorders, psychiatric factors, etc. , 1. Allergic reaction: when patients are exposed to special drugs or food and other allergens lead to facial allergy, which can be characterized by numbness and itchiness of the face, rash and so on. 2. Intracranial diseases: including cerebral hemorrhage, cerebral infarction, traumatic brain injury and other diseases caused by brain cell damage, sensory center dysfunction, facial sensory disorders can occur, and patients can have numbness and itching of the face and other symptoms. 3. Mental illness: when suffering from depression, schizophrenia, may consciously have symptoms such as numbness and itching of the face. Face numbness and itching should go to the hospital, under the guidance of the doctor to take reasonable treatment.