The effect of antiviral agents on recovery from facial palsy in patients wi
th tester sine herpete (ZSH; varicella tester virus reactivation without te
ster) has not been evaluated because ZSH is difficult to diagnose early aft
er onset. In this study, all 13 patients who received acyclovir-prednisone
treatment within 7 days of onset, as confirmed by a positive PCR result, sh
owed complete recovery. PCR-based early diagnosis of ZSH and antiviral ther
apy elicited an excellent outcome for recovery from facial palsy due to ZSH
.