Bell's palsy is a temporary facial paralysis characterized by the inability to control facial muscles on the affected side, usually improving over weeks. Symptoms range from mild weakness to total paralysis, potentially including muscle twitching, drooping of the eyebrow, altered taste, and ear pain. The onset of symptoms generally occurs within 48 hours. Some individuals may experience hyperacusis, an increased sensitivity to sound. While the condition is typically temporary, it can significantly impact facial expression and function during its duration.
In 1982, a study found that 85% of patients with Bell's palsy showed signs of recovery within three weeks without treatment.
During the 1993 Canadian federal election, an attack ad targeting Jean Chrétien's facial expressions (due to Bell's palsy) backfired, increasing his popularity.
In 2007, the American Academy of Neurology did not recommend surgical decompression for Bell's Palsy.
In 2015, a review found no effect of treatment, regardless of the severity of Bell's Palsy.
In December 2020, the U.S. FDA recommended monitoring recipients of the Pfizer and Moderna COVID-19 vaccines for Bell's palsy symptoms after cases were reported in clinical trials, but a causal link was undetermined.
In 2021, an updated Cochrane review was unable to determine if early surgery is beneficial or harmful for Bell's Palsy.
On April 25, 2024, Joel Hans Embiid of the Philadelphia 76ers scored 50 points in a playoff game while suffering from Bell's Palsy.
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