Bell's palsy

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Illustration of the facial nerve and muscles affected by Bell's palsy

Illustration copyright 2003 Nucleus Communications, Inc. All rights reserved. http://www.nucleusinc.com

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.

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Last Updated: 08/08/2007