Bell's Palsy May be Caused by Herpes Simplex Virus Reactivationhttp://articles.mercola.com/sites/articles/archive/2008/01/02/bells-palsy-caused-by-herpes-simplex.aspxNew findings "strongly" implicate reactivation of herpes simplex virus (HSV-1) in the development of Bell's palsy. It remains to be seen whether facial palsy .is caused by direct injury to the facial nerve or by a virus-associated immune-mediatedenCommunityServer 2008.5 SP1 (Build: 31106.3070)