Bell's palsy laboratory findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Laboratory Findings

• Laboratory studies are not routinely needed in the diagnosis of Bell’s palsy and are only recommended in patients with:
  • Recurrence
  • No improvement after more than 3 weeks of therapy

• Blood studies for an underlying systemic disease or infection may also be considered in patients with Bell's palsy.
• There is no test that provides prognostic information early enough to be used for guiding treatment or prognosis.