What is the recommended treatment for Bell's palsy?

Treatment of Bell's Palsy

For adults and adolescents ≥16 years with Bell's palsy, prescribe oral corticosteroids within 72 hours of symptom onset—this is the single most important intervention to improve facial nerve recovery and reduce long-term disability. 1, 2

Primary Treatment Algorithm

First-Line: Oral Corticosteroids (MANDATORY)

• Prednisolone 60 mg daily for 5 days, then taper over 5 days OR
• Prednisolone 25 mg twice daily for 10 days OR
• Prednisone 60 mg daily for 5 days with 5-day taper

Critical timing: Must initiate within 72 hours of symptom onset. Evidence for benefit after 72 hours is unclear. 1

The evidence supporting steroids is robust—two high-quality RCTs (Sullivan et al. with 551 patients and Engstrom et al. with 829 patients) demonstrated that 83-94.4% of steroid-treated patients achieved complete recovery versus 63.6-81.6% with placebo. 1

Optional Add-On: Antiviral Therapy

You may add (not replace) an antiviral to steroids within 72 hours:

• Valacyclovir 1g three times daily for 7 days OR
• Acyclovir 400 mg five times daily for 10 days 1, 3

The evidence for combination therapy is mixed—some smaller trials showed modest improvements (96.5% vs 89.7% complete recovery), but the benefit is small and inconsistent. The guideline rates this as an "option" with equilibrium of benefit and harm. 1

Never prescribe antivirals alone—this is explicitly contraindicated as it provides no benefit over placebo. 1

Essential Eye Protection (MANDATORY)

Implement aggressive eye care for patients with impaired eyelid closure to prevent corneal injury:

• Artificial tears during the day
• Lubricating ointment at night
• Eye taping or moisture chamber if needed
• Immediate ophthalmology referral if ocular symptoms develop 1, 2

Special Population: Children

For pediatric patients, the evidence is weaker. Children have higher spontaneous recovery rates (up to 90%) than adults, and no controlled trials support steroid use in this age group. 1

However, given the similar disease mechanism and favorable benefit-harm ratio, oral steroids may be considered with significant caregiver involvement in decision-making. Use the same dosing regimen if treating. 1

What NOT to Do

Do NOT routinely order:

• Laboratory testing (Lyme serology, metabolic panels)—only order if history/exam suggests alternative diagnosis 2
• Imaging (CT/MRI)—only obtain if atypical features present (see below) 1, 2
• Electrodiagnostic testing for incomplete paralysis—offers no benefit 2

Recent data shows these non-recommended practices are actually increasing despite guidelines (imaging use rose from 32.9% to 41.0% post-guideline publication), representing unnecessary cost and radiation exposure. 4

Red Flags Requiring Imaging or Specialist Referral

Order MRI with contrast of the entire facial nerve course (including internal auditory canal) if:

• Recurrent paralysis on the same side
• Isolated branch paralysis (not all facial muscles affected)
• Other cranial nerve involvement
• History of temporal bone trauma or tumor
• No recovery after 3 months 1, 2

Refer to facial nerve specialist for:

• New or worsening neurologic findings at any point
• Ocular symptoms developing at any point
• Incomplete recovery at 3 months 1, 2

Common Pitfalls to Avoid

1. Delayed treatment: The 72-hour window is critical. Treatment initiation occurs on the index date in 94.56% of cases, so don't delay. 5

2. Antiviral monotherapy: This provides zero benefit and wastes resources. Always pair with steroids if using antivirals. 1

3. Missing alternative diagnoses: Bell's palsy is a diagnosis of exclusion. Rule out stroke (forehead sparing suggests central lesion), Ramsay Hunt syndrome (vesicles in ear canal), Lyme disease (endemic areas), tumors, and sarcoidosis through history and physical exam. 1

4. Inadequate eye protection: Corneal exposure is a major source of morbidity. Don't underestimate this risk. 1, 2

5. Over-testing: Only 51.9% of patients receive guideline-concordant care, with many receiving unnecessary imaging and labs that don't change management. 5, 4

Adjunctive Therapies (Insufficient Evidence)

The guidelines make no recommendation for:

• Surgical decompression
• Acupuncture
• Physical therapy 1, 2

While one case report suggests osteopathic manipulative treatment and physical therapy may help, the evidence is too limited to recommend routinely. 6 However, physical therapy may be considered for severe paralysis cases. 3

Prognosis Context

More than two-thirds of untreated patients recover completely spontaneously. With steroid treatment, this increases to 83-94%. The goal of treatment is to maximize complete recovery and minimize long-term sequelae like synkinesis (involuntary facial muscle co-contraction). 1, 3