Which lab tests may be used in the diagnosis of Bell palsy (idiopathic facial paralysis) (IFP)?

Updated: Jun 14, 2019
  • Author: Danette C Taylor, DO, MS, FACN; Chief Editor: Selim R Benbadis, MD  more...
  • Print

Although there are no specific diagnostic tests for Bell palsy, the following may be useful for identifying or excluding other disorders:

  • Rapid plasma reagin and/or venereal disease research laboratory test or fluorescent treponemal antibody absorption test

  • HIV screening by enzyme-linked immunosorbent assay and/or Western blot

  • Complete blood count

  • Erythrocyte sedimentation rate

  • Thyroid function

  • Serum glucose

  • CSF analysis

  • Blood glucose

  • Hemoglobin A1c

  • Antineutrophil cytoplasmic antibody levels

  • Salivary flow

  • Schirmer blotting test

  • Nerve excitability test

  • Computed tomography

  • Magnetic resonance imaging

See Workup for more specific information on testing and imaging modalities for Bell palsy.

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!