Bell’s palsy — idiopathic peripheral facial paresis of acute onset — is the most common form of unilateral facial paralysis, with an annual incidence of 20–30 cases per 100,000 inhabitants. Standard treatment consists of high-dose oral corticotherapy initiated in the first 72 hours (prednisolone or prednisone), with addition of antiviral (valacyclovir) in severe presentations. Most patients (~70–80%) recover complete facial function, but 20–30% present sequelae — synkinesis, contractures, residual paresis — with cosmetic and functional impact. Acupuncture, electroacupuncture, and moxibustion have been studied historically in this scenario, with a dedicated Cochrane review.
What the Cochrane Says
The Cochrane review on acupuncture in Bell’s palsy identifies favorable findings on facial function scales, with consistent signals of improvement in the intervention group compared with standard treatment alone. However, the Cochrane explicitly notes the methodologic limitations of the included trials: moderate samples, Asian predominance, heterogeneous diagnostic criteria, variable active controls, and limited blinding. The prudent conclusion of the review is that the observed benefit needs to be confirmed in higher-quality trials before a formal recommendation.
Importance of Initiating Corticotherapy
The most important point of clinical practice remains the early initiation of oral corticotherapy — ideally in the first 72 hours of symptom onset. Acupuncture is adjuvant, not substitute, and its relative benefit is greater when applied after control of the acute inflammatory component, in the neural repair phase. In patients with severe paralysis (House-Brackmann V–VI), addition of antiviral is recommended.
Limitations of the Evidence
The Cochrane limitations remain valid: methodologic heterogeneity, predominance of Asian studies, absence of Western multicenter trials with adequate statistical power, blinding difficulty, and variability in inclusion criteria. There is a need for Western pragmatic trials with long follow-up and patient-centered outcomes.
MANAGEMENT OF ACUTE BELL’S PALSY
| LINE | INTERVENTION | WHEN |
|---|---|---|
| 1st line | Prednisolone 60–80 mg/day × 7 days | Initiate in the first 72 hours |
| 1st line in severe cases | Add valacyclovir | House-Brackmann V–VI |
| Ocular care | Ocular lubricants, nighttime occlusion | In paresis of orbicularis oculi |
| Adjuvant | Facial acupuncture/electroacupuncture | Typically initiate after day 7–14 |
| Refractory cases | Rehabilitation by specialized team | Long-term sequelae |
72-hour window
Early corticosteroid initiation is the factor with greatest impact on prognosis.
Acupuncture in the reparative phase
Greater benefit in trials after the acute inflammatory peak (7–14 days).
Without delaying standard treatment
Acupuncture never replaces corticotherapy; should be a coordinated adjuvant.
Fonte Original
Cochrane Database of Systematic Reviews(em inglês)Founded in 1989 by physicians trained at the University of São Paulo (USP) and specialized in China, CEIMEC is a Brazilian national reference in the teaching and practice of medical acupuncture. With more than 3,000 physicians trained over 35 years, it collaborates with HC-FMUSP and is recognized by the Brazilian Medical College of Acupuncture (CMBA/AMB).
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