Effects of meteorological factors on the onset of Bell's palsy

The mean values for the meteorological parameters did not differ significantly between the days when BP onset did and did not occur. However, the maximum wind speed on day −1 (D−1) was significantly higher for BP onset days than for days with no BP onset. The seasonal and monthly distributions of BP did not differ significantly. It is suggested that stronger wind speed of preceding day may be related to the occurrence of BP.