Facial Numbness Evaluation and Management

Immediate Assessment and Diagnostic Approach

The American Academy of Otolaryngology-Head and Neck Surgery recommends assessing onset timing, as acute onset (<72 hours) suggests stroke or Bell's palsy, while gradual progression suggests neoplasm or infection 1, 2
Associated symptoms requiring urgent evaluation include visual changes or eye pain, and other cranial nerve involvement 3
The American Academy of Otolaryngology-Head and Neck Surgery suggests considering endemic area for Lyme disease in patients with facial numbness 4

The American Academy of Otolaryngology-Head and Neck Surgery recommends MRI of brain, orbit, face, and neck with and without contrast as the imaging test of choice for facial numbness 4, 5
If Bell's palsy is confirmed, the American Academy of Otolaryngology-Head and Neck Surgery recommends prescribing oral corticosteroids within 72 hours of symptom onset, with evidence showing 83% recovery at 3 months vs 63.6% with placebo 4, 5
The British Journal of Anaesthesia suggests considering laboratory testing, including Lyme serology and ESR/CRP, in certain cases of facial numbness 2, 6, 7

The American Academy of Otolaryngology-Head and Neck Surgery recommends reassessing or referring to a specialist if there are new or worsening neurologic findings, no improvement within 2-3 weeks, incomplete recovery at 3 months, or development of ocular symptoms 3, 4, 5