History of Bell's palsy in Timeline

By Popular Timelines Editorial Team · Updated: February 25, 2025

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.

1982: Study on Bell's Palsy Recovery

In 1982, a study found that 85% of patients with Bell's palsy showed signs of recovery within three weeks without treatment.

1993: Attack Ad During Canadian Federal Election

During the 1993 Canadian federal election, an attack ad targeting Jean Chrétien's facial expressions (due to Bell's palsy) backfired, increasing his popularity.

2007: American Academy of Neurology does not recommend surgical decompression.

In 2007, the American Academy of Neurology did not recommend surgical decompression for Bell's Palsy.

2015: Review finds no effect of treatment on severe disease

In 2015, a review found no effect of treatment, regardless of the severity of Bell's Palsy.

December 2020: FDA Recommends Monitoring for Bell's Palsy Symptoms After COVID-19 Vaccination

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.