Facial numbness two diseases need to be vigilant is not accurate, clinically can cause facial numbness for a variety of reasons, physiological diseases, such as facial cold, etc.; intracranial diseases, including cerebral hemorrhage, cerebral infarction, intracranial infectious diseases; damage to the maxillary branch of the trigeminal nerve, and so on. 1. Physiological factors: when affected by the external environmental temperature, facial numbness can occur when the face is cold, and can be restored when returning to a warm environment. 2. Intracranial diseases: including cerebral hemorrhage, cerebral infarction, intracranial malignant tumors, intracranial infectious diseases, etc., if the trigeminal spinal tract nucleus of the face is involved, facial sensory impairment can occur, and there are symptoms of facial numbness. 3. Peripheral neuropathy: for example, damage to the maxillary branch of the trigeminal nerve leads to facial numbness. If there are symptoms of persistent numbness of the face, it is recommended that the patient should go to the neurology clinic in the hospital.