How is the facial paralysis in Bell palsy (idiopathic facial paralysis) (IFP) differentiated from other disorders?

Updated: Jun 14, 2019
  • Author: Danette C Taylor, DO, MS, FACN; Chief Editor: Selim R Benbadis, MD  more...
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If a patient has gradual onset of facial paralysis, weakness of the contralateral side, or a history of trauma or infection, other causes of facial paralysis must be strongly considered. Progression of the paresis is possible, but it usually does not progress beyond 7–10 days. A progression beyond this point suggests a different diagnosis. Patients who have bilateral facial palsy must be evaluated for Guillain-Barré syndrome, Lyme disease, and meningitis.

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