Shockwave Therapy for Bell’s Palsy: New Research Shows It May Help Regenerate the Facial Nerve
If you or someone you love is living with Bell’s palsy, you already know how frustrating recovery can be. For many people, the initial facial weakness improves within weeks. But for others, that drooping eyelid, uneven smile, or lack of muscle control lingers for months or even years. If you’re in that second group, there’s encouraging news: a growing body of research suggests that low-intensity extracorporeal shockwave therapy (Li-ESWT) may help the facial nerve heal, even in cases that have become chronic.
What Is Shockwave Therapy?
Extracorporeal shockwave therapy uses focused acoustic (sound) energy delivered through the skin to stimulate healing in soft tissue and nerves. It’s been used for years in orthopedics to treat stubborn tendon and soft-tissue injuries, and it’s now being studied for nerve conditions like Bell’s palsy. The treatment is non-invasive, drug-free, and performed right in a physical therapy clinic — no needles, no surgery, no downtime.
The New Research: Shockwave Therapy and Axonal Regeneration
What’s especially exciting is a 2022 randomized controlled trial published in the SVU-International Journal of Medical Sciences that looked specifically at whether shockwave therapy could support nerve regeneration in people with chronic Bell’s palsy — cases that had lasted six months or longer, a population that traditionally has a much harder time recovering.
Study: “Response of Axonal Regeneration in Chronic Bell’s Palsy to Low Intensity Shockwave Therapy: Randomized Control Trial” — Ahmed et al., SVU-International Journal of Medical Sciences, Vol. 5, Issue 2 (2022), pp. 599–606. Read the full study (PDF)
Researchers followed 60 adults with chronic Bell’s palsy. Half received low-intensity shockwave therapy plus standard Kabat facial exercises for six weeks; the other half received the exercises alone (with a sham shockwave treatment). Using nerve conduction studies, the team measured two key markers of nerve health before and after treatment: the degeneration index (a measure of nerve fiber damage) and facial nerve amplitude (a measure of how strongly the nerve is signaling the muscle).
The results were striking:
- In the shockwave group, the degeneration index dropped from about 75% to 30% — a statistically significant improvement (p < 0.001). The exercise-only group barely changed, and that change wasn’t statistically significant (p = 0.295).
- Facial nerve amplitude nearly tripled in the shockwave group, rising from roughly 0.6 to 1.6, compared to only a small increase in the exercise-only group (p < 0.001).
In plain terms: the nerve signal readings improved significantly more in the patients who received shockwave therapy, suggesting the treatment was supporting nerve fiber recovery beyond what facial exercises alone could achieve. The study authors concluded that low-intensity shockwave therapy “seems to be a reliable and secure noninvasive treatment for axonal degeneration in patients suffering from chronic Bell’s palsy.”
It’s worth noting this was a single trial with 60 participants, and as with any single study, larger and repeated trials will help confirm and refine these findings. But for a condition where chronic cases have historically had limited treatment options, results like these are a meaningful step forward.
Why This Matters If You Have Lingering Facial Weakness
Standard Bell’s palsy care typically includes corticosteroids in the first days after onset, along with facial exercises and eye protection. That approach works well for many people early on. But if weeks or months have passed and you’re still dealing with asymmetry, synkinesis (unwanted muscle movements), or weakness, exercise alone may not be enough to finish the job. This is exactly the population the new research focused on — and exactly where shockwave therapy appears to offer real promise as an added tool.
What Shockwave Therapy for Bell’s Palsy Looks Like in Practice
When combined with a comprehensive facial rehabilitation program — including neuromuscular re-education, targeted facial exercises, and manual techniques — shockwave therapy can be part of a well-rounded plan aimed at restoring symmetry, function, and confidence. Because it’s non-invasive and generally well tolerated, it’s a reasonable option to discuss even if you’ve already tried other treatments without full results.
Ready to Explore Your Options?
You don’t have to accept lingering facial weakness as permanent. If Bell’s palsy has left you with symptoms that haven’t fully resolved, our team at Pursuit Physical Therapy can evaluate your case and talk with you about whether shockwave therapy and a targeted facial rehab program are a good fit for you.
Call Pursuit Physical Therapy today to start your treatment and take the next step toward recovery.
This article is for educational purposes and is not a substitute for individualized medical advice. Talk with your physical therapist or physician about whether shockwave therapy is appropriate for your specific situation.
Source: Ahmed AA, Elshazly M, Asal MS, Moubarak EES, Hussein MRB, El Malky I. Response of Axonal Regeneration in Chronic Bell’s Palsy to Low Intensity Shockwave Therapy: Randomized Control Trial. SVU-International Journal of Medical Sciences. 2022;5(2):599-606. Available at: https://svuijm.journals.ekb.eg/article_273106_f84322445ffa6c558704e86773d82429.pdf
