What is Bell palsy (idiopathic facial paralysis) (IFP)?

Updated: Jun 14, 2019
  • Author: Danette C Taylor, DO, MS, FACN; Chief Editor: Selim R Benbadis, MD  more...
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Answer

Bell palsy, more appropriately termed idiopathic facial paralysis (IFP), is the most common cause of unilateral facial paralysis. Bell palsy is an acute, unilateral, peripheral, lower-motor-neuron facial nerve paralysis that gradually resolves over time in 80-90% of cases.


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