The causes of numbness on both sides of the face are: facial neuritis, trigeminal nerve damage, and cervical spondylosis. First, facial neuritis causes, in serious cases, symptoms such as crooked mouth and eyes, drooling and facial numbness. Second, damage to the trigeminal nerve, which conducts to the trigeminal nucleus and transmits information through the trigeminal nucleus and to the cerebral cortex, can cause numbness of the face in all these areas. Ischemia, infection, degeneration, tumor and occupational disease, demyelinating disease, damage to the trigeminal nerve and the trigeminal nucleus and the cortex above the nucleus, resulting in numbness on both sides of the face. Third, facial numbness caused by cervical spine diseases, such as cervical spinal stenosis compression of the nerve. When facial numbness occurs, you must pay more attention to keeping warm, avoid washing your hair and face with cool water, avoid staying up late, avoid overexertion, and timely hospital treatment.