Trigger Point Dry Needling
Dommerholt et al. · The Journal of Manual & Manipulative Therapy · 2006
Evidence Level
MODERATEOBJECTIVE
To review the technique of trigger point dry needling, its theoretical foundations, clinical evidence, and mechanisms of action
DURATION
Comprehensive literature review through 2006
POINTS
Myofascial trigger points in various muscles, including trapezius, multifidus, and gluteus medius
🔬 Study Design
Narrative review
n=0
Analysis of the literature on dry needling
📊 Results in numbers
Efficacy of dry needling
Overlap between trigger points and acupuncture points
Physical therapists in South Africa using the technique daily
U.S. states approving the technique
Percentage highlights
📊 Outcome Comparison
Regulatory approval by country
Trigger point dry needling is a technique in which physical therapists (in international settings) insert thin needles into painful spots in the muscles to relieve pain. It differs from traditional acupuncture in that it is based on scientific knowledge of anatomy and muscle pain rather than Eastern energy concepts. For indication and protocol in your specific case, consult a specialist physician.
Article summary
Plain-language narrative summary
This review article presents a comprehensive analysis of trigger point dry needling (TrP-DN), an invasive therapeutic technique used—in international settings where regulations allow—in several countries. Dry needling consists of inserting acupuncture needles into the skin and muscles, specifically targeting myofascial trigger points (MTrPs), defined as hyperirritable spots in skeletal muscle associated with palpable hypersensitive nodules in taut bands. The technique has gained increasing recognition in physical therapy and is approved in several countries including Canada, Chile, Ireland, the Netherlands, South Africa, Spain, and the United Kingdom. The article presents different conceptual models for dry needling, including the radiculopathy model developed by Gunn—based on the Cannon-Rosenblueth Law of Denervation—and the trigger point model, which focuses specifically on MTrPs.
The trigger point model distinguishes between superficial (TrP-SDN) and deep (TrP-DDN) dry needling, each with specific indications and techniques. Superficial dry needling, developed by Baldry, involves inserting needles 5-10 mm in depth over the trigger points, while deep dry needling penetrates directly into the trigger point to elicit local twitch responses (LTRs). Clinical evidence demonstrates significant efficacy of TrP-DN. Lewit reported immediate analgesia in 87% of treated sites, with 31% of cases showing permanent relief.
More recent studies, including a 2005 Cochrane review, concluded that dry needling may be a useful adjunct to other therapies for chronic low back pain. Research by Shah et al. demonstrated that eliciting LTRs normalizes the biochemical environment in active trigger points, significantly reducing concentrations of nociceptive substances such as bradykinin, CGRP, and substance P. The mechanisms of action of TrP-DN remain partially elusive but include possible mechanical disruption of contraction knots, oxytocin release, stimulation of Aδ fibers, and activation of descending pain inhibitory systems.
Intramuscular electrical stimulation (IES) can be combined with needling to enhance therapeutic effects. The article addresses important regulatory issues, highlighting initial resistance similar to that faced by manual therapy in the 1960s. The introduction of TrP-DN into American physical therapy has historical parallels with the acceptance of manual therapy, encountering initial academic and professional resistance. Comparisons with trigger point injections suggest equivalent efficacy between dry needling and injection therapy, calling into question the need for injectable substances in many cases.
The distinction between TrP-DN and traditional acupuncture is clearly established, emphasizing that although they use similar tools, they are based on completely different principles. Dry needling is grounded in scientific neurophysiological and biomechanical principles, while traditional acupuncture is based on Eastern energy concepts. The article concludes that TrP-DN represents a relatively new and promising therapeutic modality in physical therapy, with a growing body of scientific evidence supporting its efficacy. Limitations include the need for specialized training, safety concerns related to the invasive nature of the procedure, and variability in applied techniques.
Future research should focus on specific mechanisms of action, technique standardization, and the development of treatment protocols based on more robust evidence.
Strengths
- 1Comprehensive review of the international literature on dry needling
- 2Detailed analysis of different conceptual models and techniques
- 3In-depth discussion of regulatory aspects and professional scope
- 4Systematic comparison with other therapeutic modalities
- 5Solid scientific basis underpinning the technique
Limitations
- 1Limited data on standardization of techniques and protocols
- 2Need for more randomized controlled trials
- 3Safety issues and adverse events insufficiently addressed
- 4Variability in professional training and competence
- 5Mechanisms of action still only partially understood
Expert Commentary
Dr. Marcus Yu Bin Pai
MD, PhD · Pain Medicine · Physical Medicine and Rehabilitation · Medical Acupuncture
▸ Clinical Relevance
This review by Dommerholt et al. consolidates the conceptual and clinical foundations of trigger point dry needling at a time when the technique was still seeking regulatory and scientific legitimacy. For clinicians working in musculoskeletal pain services, the text offers a clear map of available treatment models—the Gunn radiculopathy model and the Travell and Simons trigger point model—allowing the physician to select the most appropriate approach for the patient's profile. The equivalent efficacy between dry needling and trigger point injections has direct practical implications: in patients with contraindications to local anesthetics or who prefer to avoid injectable substances, dry needling represents a first-line alternative without sacrificing outcomes. The inclusion of biochemical data on normalization of the microenvironment in active trigger points grounds clinical decision-making in concrete neurophysiology, going beyond mere empiricism.
▸ Notable Findings
Lewit's finding—immediate analgesia in 87% of treated sites—remains one of the most cited references in the trigger point literature and deserves attention for what it reveals about the mechanism: the local twitch response elicited by deep needling appears to be the central mediating event. The work of Shah et al., presented in this review, advances beyond the clinical phenomenon by demonstrating measurable reductions in bradykinin, CGRP, and substance P in the microenvironment of the active trigger point after eliciting LTRs—providing biochemical substrate for what we observe clinically as resolution of local hypersensitivity. The 71% overlap between trigger points and traditional acupuncture points is notable not because it brings the practices closer together, but because it suggests that both traditions converge empirically on regions of high neurovascular density, which reinforces the anatomical relevance of the treatment targets regardless of the theoretical framework adopted.
▸ From My Experience
In my practice in the musculoskeletal pain clinic, trigger point dry needling is a tool I use weekly, especially in cervical, lumbar, and rotator cuff myofascial syndromes. I usually observe a clinically relevant response—reduction in pain and improvement in range of motion—starting from the second or third session, with a therapeutic plateau generally reached between the sixth and tenth sessions depending on chronicity. Patients with pain of less than three months respond more quickly and with fewer sessions; chronic cases with associated central sensitization require combination with supervised eccentric exercise and, frequently, adjuvant pharmacological modulation. The profile that responds best is the patient with a palpable taut band and reproducible referred pain—when this phenomenon is absent, I reconsider the diagnosis before proceeding. I do not recommend the technique in patients with uncorrected coagulopathy, regional lymphedema, or severe needle phobia without prior preparation.
Indexed scientific article
This study is indexed in an international scientific database. Check your institutional access to obtain the full article.
Scientific Review
Marcus Yu Bin Pai, MD, PhD
CRM-SP: 158074 | RQE: 65523 · 65524 · 655241
PhD in Health Sciences, University of São Paulo. Board-certified in Pain Medicine, Physical Medicine and Rehabilitation, and Medical Acupuncture. Scientific review and curation of every entry in this library.
Learn more about the author →Medical disclaimer: This content is for educational purposes only and does not replace consultation, diagnosis, or treatment by a qualified professional. Some information may be assisted by artificial intelligence and is subject to inaccuracies. Always consult a physician.
Content reviewed by the medical team at CEIMEC — Integrated Centre for Chinese Medicine Studies, a reference in Medical Acupuncture for over 30 years.
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