Unilateral facial numbness can be a symptom of multiple sclerosis or pressure on the facial nerve by a tumor: http://info.med.yale.edu/caim/cnerves/cn7/cn7_1.html
Cortisone may reduce inflammation and restore sensation in your face. Niacin (one of the B complex vitamins) sometimes assists with reducing numbness. Elavil is a tranquilizer and antidepressant that may be effective in reducing numbness. Other antidepressants, such as Pamelor or Tofranil, may be helpful.
An abnormally low vermian volume is occasionally associated with chronic alcoholism or schizophrenia.
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