Shockwave Therapy for Chronic Trigger Points

Shockwave Therapy for Chronic Trigger Points: Why Some Muscle Knots Won’t Release — and What Actually Works

By Dr. Matthew Wilson, DC, FIACA | Ashworth Chiropractic, Physical Therapy & Acupuncture | West Des Moines, Iowa

You know the spot. Right between the shoulder blade and the spine, or deep in the upper trapezius, or camped out in the low back — a tight, tender knot that flares with stress, doesn’t fully release with stretching, and comes back within days of a massage that helped for an afternoon.

That’s a myofascial trigger point, and for most people, it responds well to conservative care: massage, stretching, heat, time. But for a meaningful subset of patients, the knot is chronic — it’s been there for months or years, it’s resistant to manual release, and the usual toolkit isn’t moving it.

That’s where shockwave therapy comes in, and it’s backed by a research base that’s grown substantially in the last several years.

What Is a Myofascial Trigger Point, and Why Do Some Become Chronic?

A myofascial trigger point is a hyperirritable nodule within a taut band of skeletal muscle. Pressing on one reproduces pain locally and often refers pain to a distance from the actual site — the reason a trigger point in the upper trapezius can produce a headache, or one in the gluteal muscles can mimic hip or low back pain.

Most trigger points resolve with the usual conservative approach — massage, stretching, activity modification, time. What separates a chronic trigger point from an ordinary one isn’t location, it’s persistence: the muscle has been in a sustained contracted state long enough that local blood flow and metabolic activity in that specific tissue zone have been disrupted, creating a self-sustaining cycle. Sustained contraction restricts local circulation, restricted circulation prevents the tissue from clearing metabolic byproducts and inflammatory mediators, and that chemical environment keeps the muscle fibers locked in the contracted state. Stretching and massage address the muscle tension directly, but they don’t always break this underlying metabolic cycle — which is part of why some trigger points keep coming back even when the mechanical tension is released in the moment.

Myofascial pain syndrome is one of the most common causes of musculoskeletal pain seen in clinical practice, and the neck, shoulder, and upper back are the most frequently affected regions.

Shockwave Therapy for Chronic Trigger Points

Shockwave therapy delivers high-energy acoustic waves directly into the affected muscle tissue, targeting the trigger point itself rather than just the surrounding tension. The biological effects that make this useful for a chronic, metabolically-stuck presentation include:

• Stimulates local blood flow (neovascularization), directly addressing the circulation deficit that keeps a chronic trigger point self-sustaining
• Disrupts the sustained contraction cycle at the cellular level, rather than only providing mechanical release the way manual pressure does
• Reduces substance P and other pain-signaling mediators concentrated at the trigger point site
• Modulates local nerve sensitivity, addressing the referred-pain component that makes chronic trigger points feel disproportionate to their size
• Reaches deep tissue layers that manual pressure and massage may not fully access, particularly in larger muscle groups like the gluteals or deep paraspinals

In plain terms: Massage and Shockwave both treat the chronic trigger points, but they use different methods to accomplish the same goal.  Shockwave may be indicated when the massage alone does not resolve it.

What the Clinical Research Shows

Systematic Review and Meta-Analysis — 571 Patients, Controlled Clinical Studies

A 2022 systematic review and meta-analysis published in the Annals of Translational Medicine (Wu et al.) evaluated ESWT for myofascial pain syndrome, with 571 patients pooled across the included studies — the majority with neck and upper back trigger points. The review’s conclusion was direct: ESWT can avoid the adverse effects associated with invasive procedures, and compared with trigger point injection, dry needling, and ultrasound therapy, ESWT more effectively relieved pain in patients with myofascial pain syndrome.

Wu T, Li S, Ren J, et al. Ann Transl Med. 2022;10(4):165. DOI: 10.21037/atm-22-295.

Trapezius-Specific Systematic Review

A separate 2020 systematic review and meta-analysis published in the Archives of Physical Medicine and Rehabilitation (Zhang et al.) focused specifically on ESWT for myofascial pain syndrome of the trapezius — one of the most common trigger point locations. The review concluded that ESWT benefits patients with trapezius MPS by alleviating pain, and while it may not fully replace conventional therapies, it functions well as an adjunct treatment.

Zhang Q, Fu C, Huang L, et al. Arch Phys Med Rehabil. 2020;101(8):1437-1446. DOI: 10.1016/j.apmr.2020.02.013.

Focused ESWT Specifically

A third systematic review, also published in 2020 in the journal Medicine (Yoo et al.), looked specifically at focused ESWT — the type of shockwave technology used at Ashworth Chiropractic — for trapezius myofascial pain syndrome. This distinction matters: much of the broader trigger point literature includes radial devices, which deliver energy differently and less precisely than focused technology.

Yoo JI, Oh MK, Chun SW, et al. Medicine (Baltimore). 2020;99(7):e19085. DOI: 10.1097/MD.0000000000019085.

Head-to-Head vs. Traditional Treatment

ESWT vs. Dry Needling

A randomized controlled trial published in the American Journal of Physical Medicine & Rehabilitation (Luan et al.) directly compared extracorporeal shock wave therapy against dry needling for myofascial trigger points — dry needling being one of the most commonly used interventional treatments for this condition. This head-to-head comparison is part of why shockwave is increasingly considered a legitimate non-invasive alternative for patients who’d rather not have needles inserted into the affected muscle.

Luan S, Zhu ZM, Ruan JL, et al. Am J Phys Med Rehabil. 2019;98:677-684. DOI: 10.1097/PHM.0000000000001173.

CuraMedix / Storz Medical Clinical Data

CuraMedix, the U.S. distributor for Storz Medical — whose Duolith SD1 Ultra we use at Ashworth Chiropractic — reports an over 80% patient satisfaction rate across treated musculoskeletal conditions, consistent with what the peer-reviewed myofascial pain literature shows.

★ What the research consistently shows across trigger point studies:

• Significant reduction in pain at the trigger point site and in referred pain patterns
• Outperforms trigger point injection, dry needling, and ultrasound therapy in direct comparisons
• No needles, no injections — a genuinely non-invasive option for patients hesitant about interventional treatment
• Best results with focused ESWT specifically, not radial devices
• Effective across multiple trigger point locations — trapezius, quadratus lumborum, gluteal muscles, and deep paraspinal tissue

Why Shockwave Outperforms Dry Needling and Trigger Point Injections for Chronic Cases

Dry needling and trigger point injections are the most commonly offered interventional treatments for chronic trigger points, and both can provide real relief. But they’re invasive by definition — a needle enters the muscle tissue, which means discomfort during the procedure, occasional soreness afterward, and for injections specifically, the same tendon and tissue considerations that apply to any corticosteroid-based approach if used repeatedly.

Shockwave therapy addresses the same underlying mechanism — disrupting the sustained-contraction cycle at the trigger point — without a needle ever entering the tissue. For patients who’ve had dry needling with results that faded, or who are simply averse to needles, shockwave offers a genuinely different route to the same clinical target, backed by research showing it holds up well in direct comparison.

What to Expect at Ashworth Chiropractic

We use the Storz Medical Duolith SD1 Ultra — true focused shockwave, not radial. The research above specifically distinguishes focused ESWT as the more precisely targeted technology for trigger point work, which is part of why we invested in a focused device rather than the radial machines more commonly found elsewhere.

• Initial evaluation to confirm the diagnosis — locating the actual trigger point(s), distinguishing a straightforward muscular knot from a referred-pain pattern originating elsewhere, and identifying any postural or biomechanical driver keeping the muscle in a sustained contraction pattern
• A session count determined by your specific presentation, not a preset package — we’ll walk you through what your case is likely to need before you commit to anything
• Each session is brief — typically 5 to 15 minutes, no anesthesia, no needles, no downtime
• Frequently paired with chiropractic care or massage therapy, particularly when a joint restriction or postural compensation pattern is part of what’s keeping the muscle locked in a contracted state

That last point matters more here than for some of the conditions we treat with shockwave. Chronic trigger points are frequently a downstream symptom of an upstream mechanical problem — a restricted joint, an asymmetric loading pattern, a compensation the body has adopted somewhere else. Treating the trigger point without addressing what’s driving it tends to produce results that don’t hold. When that’s part of the picture, we address it as part of the plan.

Common Questions About Shockwave for Chronic Trigger Points

How is this different from a deep tissue massage?

Massage works the muscle mechanically, from the outside in, and is genuinely effective for most trigger points. Shockwave targets the trigger point’s underlying metabolic and circulatory dysfunction directly, which is why it tends to be more effective specifically for trigger points that have become chronic and resistant to manual release. The two aren’t competing treatments — many patients benefit from both.

Will this replace my need for massage therapy?

Not necessarily.  Massage and shockwave address the same problem from different angles, and combining them is common. If your trigger points respond well to regular massage, there may be no reason to add shockwave. It’s most useful for the trigger points that keep coming back despite consistent manual care.

How long do I need to have had this trigger point before shockwave is appropriate?

Shockwave is most appropriate for chronic, persistent trigger points — generally ones that have been present for months, haven’t responded to massage and stretching, or recur predictably despite conservative care. If you’re dealing with a recent, first-time muscle knot, conservative care should be tried first.

Will my insurance cover this?

Most insurance carriers in the United States do not currently cover ESWT.  Pricing and session options are covered clearly at your evaluation, before you commit to anything.

Can shockwave therapy be combined with chiropractic care?

Yes, and for chronic trigger points specifically, we frequently recommend it. When a joint restriction or postural pattern is driving the muscle to stay locked in a contracted state, addressing that alongside the trigger point itself — rather than treating the muscle in isolation — is part of what a thorough plan for this condition looks like here.

Learn More about Shockwave Therapy and the many conditions it can treat.

Clinical References

The following peer-reviewed studies were retrieved from PubMed and cited in this article. All DOIs link to the original published research.

1. Wu T, Li S, Ren J, Wang D, Ai Y. Efficacy of extracorporeal shock waves in the treatment of myofascial pain syndrome: a systematic review and meta-analysis of controlled clinical studies. Ann Transl Med. 2022;10(4):165. DOI: 10.21037/atm-22-295
2. Zhang Q, Fu C, Huang L, Xiong F, Peng L, Liang Z, Chen L, He C, Wei Q. Efficacy of Extracorporeal Shockwave Therapy on Pain and Function in Myofascial Pain Syndrome of the Trapezius: A Systematic Review and Meta-Analysis. Arch Phys Med Rehabil. 2020;101(8):1437-1446. DOI: 10.1016/j.apmr.2020.02.013
3. Yoo JI, Oh MK, Chun SW, Lee SU, Lee CH. The effect of focused extracorporeal shock wave therapy on myofascial pain syndrome of trapezius: a systematic review and meta-analysis. Medicine (Baltimore). 2020;99(7):e19085. DOI: 10.1097/MD.0000000000019085
4. Luan S, Zhu ZM, Ruan JL, Lin CN, Ke SJ, Xin WJ, Liu CC, Wu SL, Ma C. Randomized Trial on Comparison of the Efficacy of Extracorporeal Shock Wave Therapy and Dry Needling in Myofascial Trigger Points. Am J Phys Med Rehabil. 2019;98:677-684. DOI: 10.1097/PHM.0000000000001173

About the Author

Dr. Matthew Wilson, DC, FIACA, CCWP is the owner and lead clinician at Ashworth Chiropractic, Physical Therapy & Acupuncture in West Des Moines, Iowa. He is a Palmer College of Chiropractic honors graduate with advanced certifications in Graston Technique, Postural Restoration, functional medicine, acupuncture, laser therapy, and dry needling. He selected the Storz Medical Duolith SD1 Ultra for Ashworth Chiropractic after extensive evaluation of the shockwave market.