Bell's Palsy Treatment

First-line medical therapy

• Prednisolone (e.g., 50-60 mg/day, tapered over 7-10 days) or equivalent.
• Meta-analyses comparing oral vs. IV steroids have generally found no significant difference in outcomes, supporting oral dosing as the practical default (Abdu et al., 2024, PMID 37940744).
• High-dose vs standard-dose steroids have not shown a clear added benefit in more recent meta-analysis data (Gupta et al., 2023, PMID 36706448), so standard dosing remains reasonable.

• Acyclovir or valacyclovir, combined with steroids, is sometimes used for moderate-to-severe palsy, particularly if there's suspicion of herpes zoster (Ramsay Hunt) involvement.
• A 2025 systematic review/meta-analysis (Zhu et al., PMID 39724817) found combining antivirals with steroids offers limited additional benefit over steroids alone for most patients - antivirals are not considered essential first-line therapy on their own.
• Antivirals alone (without steroids) are not recommended.

Eye protection (essential, often overlooked)

• Artificial tears (lubricating drops) during the day
• Lubricating ointment plus taping the eyelid shut at night
• Consider a moisture chamber or protective glasses
• Ophthalmology referral if corneal irritation develops

Physical therapy / facial exercises

Therapies with weaker or unclear evidence

• Low-level laser therapy: A 2024 meta-analysis (Lin et al., PMID 39546047) suggests possible benefit but data quality is limited - not yet standard of care.
• Surgical facial nerve decompression: Reserved for select severe cases (e.g., complete paralysis with poor electroneurography prognosis). A 2025 meta-analysis on timing (Wang & Pan, PMID 40692222) suggests earlier decompression may be more effective when surgery is indicated, but this remains controversial and is not routine - most patients recover without surgery.
• Acupuncture and electrical stimulation are sometimes used but lack strong supporting evidence.

Prognosis

Latest Clinical Guidelines on Bell's Palsy Management

1. Japan Society of Facial Nerve Research - 2023 Update

• Strong recommendation: systemic standard-dose corticosteroids as the cornerstone of management
• Weak/conditional recommendations (insufficient evidence for strong stance) for: high-dose corticosteroids, intratympanic corticosteroids, systemic antivirals, decompression surgery, acupuncture, physical therapy, botulinum toxin, and reanimation surgery
• Notably, this panel emphasizes that the absolute risk reduction from treatment varies by disease severity, so treatment decisions should be individualized between physician and patient rather than applied uniformly.

2. American Academy of Otolaryngology-Head and Neck Surgery Foundation (AAO-HNSF), 2013

• Diagnosis is clinical and by exclusion (no other identifiable cause, onset within 72 hours)
• Strong recommendation for oral corticosteroids within 72 hours of symptom onset
• Antivirals should not be prescribed alone (without steroids)
• Antivirals in addition to steroids may be offered (not mandated) - option, not strong recommendation
• Recommends against routine electrodiagnostic testing, imaging, or ancillary testing unless the presentation is atypical or there's no improvement
• Eye protection (lubrication, taping at night) is recommended for all patients with impaired eye closure

3. American Academy of Neurology (AAN) Evidence-Based Guideline Update

• Level A recommendation: oral steroids should be offered to all new-onset Bell's palsy patients - highly likely to increase probability of complete facial recovery (absolute risk difference ~12.8-15%)
• Level C recommendation: antivirals combined with steroids "might be offered," but evidence shows they do NOT increase recovery probability by more than 7% - patients should be counseled that any benefit is unproven and, at best, modest
• No significant safety signal against antivirals, but benefit doesn't clearly outweigh the added cost/exposure for most patients

4. Canadian Medical Association Journal (CMAJ) Guideline (de Almeida et al.)

Common threads across all current guidelines

1. Oral corticosteroids, started within 72 hours - universally the strongest, best-supported recommendation across every guideline body.
2. Antivirals are adjunctive at best - not recommended alone; added benefit with steroids is small/unproven, generally reserved for severe palsy (House-Brackmann V-VI) or suspected Ramsay Hunt syndrome.
3. Eye protection is a mandatory supportive measure in every guideline given the risk of exposure keratopathy.
4. Surgical decompression remains controversial and not broadly recommended - reserved for select severe cases; a 2021 Cochrane review found insufficient evidence to support routine surgical decompression, and this caution persists in the 2023 Japanese update.
5. Routine imaging/electrodiagnostics are not recommended for typical presentations - reserved for atypical cases or lack of expected recovery.