Table 1.

Causes and incidence of acute facial palsy²

Causes	Incidence (%)
Bell's palsy	72
Herpes simplex virus type 1	84
Herpes zoster virus:
Zoster sine herpete	16
Ramsay Hunt syndrome	7
Trauma	4
Tumour	4
Otitis media or cholesteatoma	3
Neonatal conditions	6
Rare and unusual conditions	4