Definition
By Mayo Clinic staffBell's palsy occurs when the nerve that controls facial muscles on one side of your face becomes swollen or inflamed. As a result of Bell's palsy, your face feels stiff. Half your face appears to droop, your smile is one-sided, and your eye resists closing.
Bell's palsy can affect anyone, but rarely affects people under the age of 15 or over the age of 60.
For most people, Bell's palsy symptoms improve within a few weeks, with complete recovery in three to six months. About 10 percent will experience a recurrence of Bell's palsy, sometimes on the other side of the face. A small number of people continue to have some Bell's palsy signs and symptoms for life.
- Bell's palsy fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/bells/detail_bells.htm. Accessed Nov. 10, 2009.
- Ronthal M. Bell's palsy. http://www.uptodate.com/home/index.html. Accessed Nov. 11, 2009.
- Bell's palsy. American Academy of Otolaryngology — Head and Neck Surgery. http://www.entnet.org/HealthInformation/bellsPalsy.cfm. Accessed Nov. 10, 2009.
- Bell's palsy. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/sec16/ch219/ch219i.html. Accessed Nov. 11, 2009.
- Cardoso JR, et al. Effects of exercises on Bell's palsy: Systematic review of randomized controlled trials. Ontology & Neurotology. 2008;29:557.
- De Almeida JR, et al. Combined corticosteroid and antiviral treatment for Bell palsy: A systematic review and meta-analysis. Journal of the American Medical Association. 2009;302:985.

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