Treatment of Bell's Palsy
All patients 16 years and older with Bell's palsy should receive oral corticosteroids within 72 hours of symptom onset—this is the only treatment with strong evidence for improving facial nerve recovery. 1
Primary Treatment: Oral Corticosteroids
The cornerstone of Bell's palsy treatment is high-dose oral corticosteroids initiated within 72 hours of symptom onset. 1
Recommended regimens:
- Prednisolone 50-60 mg daily for 5 days, then taper over 5 days (total 10-day course), OR 1
- Prednisolone 25 mg twice daily for 10 days 1
Evidence supporting steroids:
- 83% recovery at 3 months with prednisolone versus 63.6% with placebo (p<0.001) 1
- 94.4% recovery at 9 months with prednisolone versus 81.6% with placebo 1
- Significantly shorter time to recovery in steroid-treated patients 1
Recent evidence suggests high-dose corticosteroids (≥80 mg) may provide additional benefit compared to standard doses, with significantly decreased nonrecovery rates at 6 months (OR=0.17, p=0.004), though this requires further validation. 2
Antiviral Therapy
Do not prescribe antivirals alone—this is strongly contraindicated as antiviral monotherapy is no better than placebo. 1
Combination therapy (steroids + antivirals) may be offered as an option, particularly for:
If using combination therapy:
The evidence for combination therapy shows equilibrium of benefit and harm, with some trials showing 96.5% recovery versus 89.7% with steroids alone, though the benefit is modest. 1
Critical Eye Protection
Implement eye protection immediately for all patients with impaired eye closure—this is a strong recommendation to prevent corneal injury. 1
Eye protection measures include:
- Artificial tears during the day 1
- Lubricating ointment at night 1
- Eye patching or taping the eyelid closed during sleep 1
Treatment Timing
The 72-hour window is critical—treatment benefit after 72 hours is unclear and significantly diminished. 1 However, recent data suggests some flexibility may exist, with one study showing higher recovery rates when treatment was initiated beyond 72 hours (85.69% vs 76.92%), though this finding requires cautious interpretation given retrospective limitations. 5
Special Populations
Children (<16 years):
- Evidence for steroid use is inconclusive 1
- Children show higher spontaneous recovery rates than adults (up to 90%) 3
- Steroids may be considered with caregiver involvement in decision-making, given the favorable benefit-harm ratio 1
Pregnant women:
- Recovery rates approach 90% 3
- Risk factors include high BMI, multiple pregnancy, gestational diabetes, and preeclampsia 6
Diagnostic Requirements
Before initiating treatment, perform thorough history and physical examination to exclude other causes of facial paralysis including stroke, brain tumors, parotid tumors, Lyme disease, sarcoidosis, and herpes zoster. 1
Do NOT routinely obtain:
- Laboratory testing 1
- Diagnostic imaging (MRI/CT) 1
- Electrodiagnostic testing in incomplete paralysis 1
Treatments Without Sufficient Evidence
No recommendation can be made for:
While physical therapy may be beneficial in severe paralysis 3, and some case reports suggest osteopathic manipulative treatment may help 7, these lack high-quality evidence.
Follow-Up Requirements
Reassess or refer to a facial nerve specialist if:
- New or worsening neurologic findings develop at any point 1
- Ocular symptoms develop at any point 1
- Incomplete facial recovery at 3 months after symptom onset 1
Common Pitfalls
The most significant quality gap in Bell's palsy management is that only 51.9% of patients receive the recommended steroid treatment within 72 hours. 8 Many patients (44.7%) receive no treatment at all, and 3.4% inappropriately receive antivirals alone. 8 Treatment should be initiated on the index date in the vast majority of cases. 8