title: Bell's palsy.
abstract: BACKGROUND
  Bell's palsy is characterised by an acute, unilateral, partial or complete paralysis of the face, which may occur with mild pain, numbness, increased sensitivity to sound, and altered taste. Bell's palsy remains idiopathic, but a proportion may be caused by reactivation of herpes viruses from cranial nerve ganglia. Bell's palsy is most common in people aged 15-40 years, affecting 1 in 60 in their lifetime. Most make a spontaneous recovery within 1 month, but up to 30% have delayed or incomplete recovery.
  
  
  METHODS
  We conducted a systematic review and aimed to answer the following clinical question: What are the effects of treatments in adults and children? We searched: Medline, Embase, The Cochrane Library and other important databases up to February 2006 (Clinical Evidence reviews are updated periodically, please check our website for the most up-to-date version of this review). We included harms alerts from relevant organisations such as the US Food and Drug Administration (FDA) and the UK Medicines and Healthcare products Regulatory Agency (MHRA).
  
  
  RESULTS
  We found eight systematic reviews, RCTs, or observational studies that met our inclusion criteria. We performed a GRADE evaluation of the quality of evidence for interventions.
  
  
  CONCLUSIONS
  In this systematic review we present information relating to the effectiveness and safety of the following interventions: antiviral treatment, corticosteroids (alone or plus antiviral treatment), facial nerve decompression surgery, and mime therapy.
authors.affiliation: Department of Otolaryngology, Head and Neck Surgery, Guy's and St. Thomas' Hospital, London, UK.
authors.forename: Julian
authors.initials: J
authors.lastname: Holland
mesh_terms: D000284:Administration, Oral; D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D000998:Antiviral Agents / Q000627:therapeutic use; D020330:Bell Palsy / Q000188:drug therapy; D005154:Facial Nerve / Q000601:surgery; D005158:Facial Paralysis; D006801:Humans; D016896:Treatment Outcome
chemical_list: D000305:Adrenal Cortex Hormones; D000998:Antiviral Agents