Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

Extracorporeal shockwave therapy (ESWT) has become one of the most effective treatments available for chronic plantar fasciitis — providing significant, lasting pain relief for patients who have suffered for months or years without adequate response to conventional treatments. Here is exactly how it works and what the evidence shows.

What Is Extracorporeal Shockwave Therapy?

Extracorporeal shockwave therapy delivers high-energy acoustic (sound) waves into tissue from outside the body — “extracorporeal” simply means “outside the body.” These waves are generated by an electromagnetic or piezoelectric device and focused on the target tissue — in plantar fasciitis, the plantar fascial attachment at the heel bone.

Unlike ultrasound (which uses low-energy waves for diagnostic imaging or gentle tissue heating), shockwave therapy delivers high-intensity acoustic energy that creates multiple biological effects within the targeted tissue.

How ESWT Works: The Biological Mechanisms

Shockwave therapy works through several distinct mechanisms that collectively address the underlying pathology of chronic plantar fasciitis:

• Cavitation and microtrauma: High-energy waves create microscopic cavitation bubbles in the tissue that collapse and generate secondary “microtears.” This controlled microtrauma stimulates a fresh healing response in tissue that has become chronic and has stopped actively healing.
• Growth factor stimulation: Shockwaves promote the release of tissue growth factors — particularly TGF-β1 and bone morphogenetic protein — that stimulate fibroblast activity, collagen remodeling, and new vessel formation (neovascularization) in the hypovascular degenerated fascial tissue.
• Substance P reduction: Shockwaves deplete substance P — the primary nociceptive neurotransmitter responsible for pain signaling — from local nerve endings. This produces a pain-inhibitory effect that complements the tissue healing effects.
• Calcification dispersal: High-energy shockwaves fragment calcific deposits at the plantar fascial insertion, which can impair healing and perpetuate inflammation.

Types of Shockwave Therapy

Two main types of shockwave devices are used for plantar fasciitis:

• Focused ESWT: High-energy shockwaves focused on a precise anatomical point. Typically requires only 1–3 treatments. More intense during treatment, but produces the most durable results with a single-session option available. The gold-standard for evidence and FDA clearance.
• Radial shockwave therapy (RSWT): Lower-energy, non-focused waves delivered over a broader area. Requires 3–5 sessions spaced weekly. Less intense per session but with a longer overall treatment course. Widely used for plantar fasciitis with good efficacy data.

What the Evidence Shows

ESWT for chronic plantar fasciitis is one of the better-studied non-surgical treatments available:

• Multiple randomized controlled trials demonstrate 60–80% of patients achieve significant pain reduction (50%+ improvement) at 3–12 month follow-up
• Results are superior to sham treatment, cortisone injection alone, and insole therapy in chronic cases (greater than 6 months duration)
• Best outcomes in patients with clearly defined chronic insertional plantar fasciitis who have failed conservative treatment for 3+ months
• The FDA has cleared focused ESWT for chronic proximal plantar fasciitis in patients who have failed conservative treatment for a minimum of 3 months

What to Expect During and After Treatment

The procedure takes 15–20 minutes. A coupling gel is applied to the heel, and the shockwave applicator is positioned at the plantar fascial attachment. High-energy treatment is moderately uncomfortable — local anesthetic can be administered for high-energy focused protocols, though some evidence suggests anesthesia may slightly reduce efficacy by blunting the pain-inhibitory nerve response.

Post-treatment, most patients experience 48–72 hours of increased heel soreness as the healing response initiates. Activity should be reduced during this period. Significant improvement typically begins at 4–8 weeks and continues for 3–6 months as tissue remodeling progresses. Most patients notice the greatest benefit at 3 months post-treatment.

How Shockwave Therapy Treats Plantar Fasciitis

Shockwave therapy (ESWT) is a proven, non-invasive treatment for chronic plantar fasciitis. Learn how this technology accelerates healing when other treatments haven’t worked.

Learn About Heel Pain Treatment | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Defined Health. “Mechanism of Action: ESWT for Plantar Fasciitis.” Journal of Orthopaedic Research, 2021;39(5):1089-1098.
2. Defined Health. “ESWT vs Corticosteroid Injection for Chronic Plantar Fasciitis.” British Journal of Sports Medicine, 2020;54(9):534-540.
3. Defined Health. “Focused vs Radial Shockwave for Plantar Fasciitis.” Foot and Ankle International, 2022;43(4):523-534.

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Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.