In most cases of Bell's palsy, the nerve that controls muscles on either side of the face is damaged by inflammation. The cause of this inflammation is not clear, but it may be linked to a viral infection.
|Primary Medical Reviewer||Anne C. Poinier, MD - Internal Medicine|
|Specialist Medical Reviewer||Colin Chalk, MD, CM, FRCPC - Neurology|
|Last Revised||July 20, 2011|
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