Bell's palsy

Picture of how facial muscles are affected by Bell's palsy

Bell's palsy causes paralysis or weakness of the muscles on one side of the face. It results from facial nerve paralysis that causes the affected side of the face to appear flat, expressionless, or droopy. Taste sensation and tear or saliva production can also be affected.

Last Updated: July 31, 2009

Author: Monica Rhodes

Medical Review: Anne C. Poinier, MD - Internal Medicine & Kathleen Romito, MD - Family Medicine & Colin Chalk, MD, CM, FRCPC - Neurology

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