- Dry needling targets painful muscle trigger points to reduce discomfort and improve your overall movement.
- This physiotherapy technique uses thin needles to deactivate muscle knots, based on modern neurophysiology, not traditional Chinese medicine.
- Dry needling works by resetting abnormal muscle mechanisms, reducing pain-causing substances, and increasing local blood flow.
- Experiencing a muscle twitch during dry needling indicates correct trigger point targeting and predicts effective pain relief.
Table of Contents
Dry needling
Dry needling is a technique used in physiotherapy that involves inserting a thin needle, similar to those used in acupuncture, directly into myofascial trigger points to deactivate them and reduce muscle pain. Unlike traditional acupuncture, which is based on traditional Chinese medicine and the concept of energetic meridians, dry needling is based on modern neurophysiology and musculoskeletal anatomy. The term “dry” indicates that the needle does not inject any substance (unlike pharmacological infiltrations).
What is a Trigger Point
A myofascial trigger point is a contracted nodule within a taut band of skeletal muscle, painful upon palpation and capable of generating referred pain (radiated) in areas even distant from the point itself.
Characteristics of a trigger point
- Taut band: palpable bundle of contracted muscle fibers
- Nodule: area of maximum tension and tenderness within the band
- Referred pain: pain that radiates in a characteristic and reproducible pattern for each muscle
- Twitch response: involuntary contraction of the taut band when the trigger point is stimulated (by palpation or with the needle)
- Muscle weakness: the muscle with active trigger points is weaker and fatigues more quickly
Active vs. Latent Trigger Points
- Active: produce spontaneous pain or with minimal activity, referred pain recognized by the patient
- Latent: painful only upon palpation, do not produce spontaneous pain but limit mobility and strength
How Dry Needling Works
Mechanism of Action
When the needle reaches the trigger point, several phenomena occur:
Local twitch response:
- Penetration of the trigger point causes a brief involuntary contraction of the taut band
- This response is considered a sign of correct trigger point localization and a predictor of treatment efficacy
- The contraction “resets” the abnormal neuromuscular mechanism
Biochemical effects:
- Reduction of algogenic substances (substance P, CGRP, bradykinin) present in the trigger point
- Normalization of local pH (the trigger point has an acidic environment)
- Reduction of spontaneous electrical activity of the motor point
Neurophysiological effects:
- Modulation of pain transmission at the spinal level (gate control)
- Activation of the endogenous endorphin system
- Reduction of central sensitization
- Normalization of motor recruitment
Mechanical effects:
- Mechanical disruption of the contracted fibers of the nodule
- Controlled micro-lesion that stimulates healing and tissue remodeling
- Increase in local blood flow
Application Techniques
Superficial dry needling
- The needle penetrates the skin and subcutaneous tissue above the trigger point, without reaching the muscle
- Depth: 1-2 cm
- Stimulation of cutaneous and subcutaneous receptors
- Less painful, indicated for sensitive patients
- Documented efficacy for neck and low back pain
Deep dry needling
- The needle penetrates to the trigger point in the muscle
- The twitch response is sought
- The needle is moved back and forth (fast-in fast-out or pistoning technique)
- More effective for deep and well-defined trigger points
- May be followed by post-treatment muscle fatigue and soreness
Dry needling with electrical stimulation (EDN)
- After inserting the needle into the trigger point, low-intensity electrical stimulation is applied
- Amplifies the contraction response and trigger point deactivation
- Used for trigger points resistant to standard treatment
Indications
Muscle pain and trigger points
- Tension headache: trigger points in the upper trapezius, suboccipitals, temporalis
- Neck pain: trapezius, levator scapulae, scalenes, sternocleidomastoid
- Back pain: rhomboids, middle-lower trapezius, paravertebrals
- Low back pain: quadratus lumborum, multifidus, glutes, piriformis
- Hip pain: gluteus medius and minimus, piriformis, TFL
Musculoskeletal conditions
- Epicondylitis: trigger points in the wrist extensors
- Plantar fasciitis: trigger points in the gastrocnemius and soleus, intrinsic foot muscles
- Myofascial syndrome: chronic widespread muscle pain
- Tendinopathies: as a complementary treatment for the muscular component
- Iliotibial band syndrome: trigger points in the TFL and vastus lateralis
- Shoulder pain: trigger points in the infraspinatus, subscapularis, deltoid
Other indications
- Bruxism and TMJ disorders: trigger points in the masticatory muscles
- Whiplash: post-traumatic trigger points in the cervical musculature
- Post-surgical pain: trigger points developed due to compensation after orthopedic surgeries
How a Session Unfolds
Preparation
- Clinical evaluation: identification of trigger points through palpation
- Explanation of the procedure to the patient
- Comfortable positioning
- Skin disinfection in the area to be treated
Treatment
- Insertion of the needle (sterile, single-use, diameter 0.25-0.40 mm, length 25-50 mm)
- Seeking the twitch response with small needle movements
- Maintaining the needle in place for 1-3 minutes (static technique) or pistoning movements
- Treatment of 3-6 trigger points per session (to avoid excessive reactions)
- Needle removal and local pressure for 1-2 minutes
After the session
- Sensation of muscle fatigue and soreness in the treated area (normal, lasts 24-48 hours)
- Apply local heat after treatment (for 15-20 minutes)
- Gentle stretching of the treated muscle
- Drink plenty of fluids
- Avoid intense exertion for 24 hours
Protocol
- Frequency: 1-2 times a week
- Number of sessions: 4-8 sessions per cycle
- Interval: at least 3-5 days between two treatments in the same area
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Contraindications
Absolute
- Severe fear of needles (belonephobia)
- Infection in the area to be treated
- Severe immune compromise
- Severe uncontrolled coagulopathies or high-dose anticoagulant therapy
- Area over an unresolved pneumothorax (caution in the thoracic region)
Relative
- Anticoagulant or antiplatelet therapy (evaluate risk/benefit ratio)
- Pregnancy (caution, avoid points known to induce contractions)
- Epilepsy (rare risk of seizures)
- Patients with great fear of needles (consider alternatives)
- Compromised vascularization in the area
- Lymphedema in the area
Dry Needling vs. Acupuncture
| Characteristic | Dry Needling | Acupuncture |
|---|---|---|
| Theoretical basis | Neurophysiology, muscle anatomy | Traditional Chinese Medicine |
| Objective | Deactivate trigger points | Rebalance the flow of Qi |
| Points treated | Myofascial trigger points | Acupuncture points (meridians) |
| Depth | Variable (specific trigger point) | Variable (coded points) |
| Needles | Same thin single-use needles | Same thin single-use needles |
| Twitch response | Actively sought | Not sought |
| Practiced by | Trained physiotherapists | Acupuncturists, doctors |
Scientific Evidence
A trigger point is a localized area of sustained muscle contraction that produces pain when pressed and can refer pain to distant body regions. Good evidence:
- Reduction of pain and disability in tension headache
- Reduction of neck pain (in combination with exercises)
- Deactivation of trigger points with reduction of referred pain
Moderate evidence:
- Chronic low back pain (as a complement to physiotherapy)
- Epicondylitis (short-term pain reduction)
- Generalized myofascial pain
Limited evidence:
- Fibromyalgia (variable results)
- Long-term efficacy (benefits are more evident in the short-medium term)
Note: Dry needling is more effective as part of a comprehensive rehabilitation program that includes therapeutic exercise, manual therapy, and correction of biomechanical causes.
Frequently Asked Questions (FAQ)
Needle insertion is generally not very painful (comparable to a mosquito bite). The local twitch response can cause a momentary cramping sensation in the treated area. After the session, it is normal to experience muscle soreness that lasts 24-48 hours, similar to post-exercise fatigue.
Yes, when performed by a trained professional. Serious complications are extremely rare. The most common side effects are post-treatment soreness, small hematomas at the insertion point, and fatigue. The risk of pneumothorax only exists for treatment in the thoracic region and is virtually eliminated with correct technique.
The first improvements are often felt after 1-2 sessions. A complete cycle generally involves 4-8 sessions. Long-standing active trigger points may require more sessions. Treatment should always be accompanied by exercises to maintain results.
In Italy, the practice of dry needling by physiotherapists is subject to regulatory discussion. In many countries (United States, Spain, Netherlands, Australia), dry needling is recognized as a competence of physiotherapists with specific training. It is important to verify that the professional has completed accredited specific training.
No, they are different techniques in terms of theoretical bases, objectives, and application methods, even if they use similar needles. Dry needling treats myofascial trigger points based on neurophysiology; acupuncture is based on traditional Chinese medicine and the concept of energetic meridians.
The information contained in this article is for informational purposes only and does not replace the advice of a doctor or physical therapist. In case of persistent muscle pain, it is advisable to consult your doctor for an evaluation.
Frequently Asked Questions
Is dry needling the same as acupuncture?
Dry needling and acupuncture are distinct techniques. While both utilize thin needles, dry needling is based on modern neurophysiology and musculoskeletal anatomy, specifically targeting myofascial trigger points. Acupuncture, conversely, is rooted in traditional Chinese medicine principles and the concept of energetic meridians.
Does dry needling hurt?
Patients may experience a brief, localized muscle twitch or cramping sensation when a trigger point is accurately targeted, which is often indicative of an effective response. While this sensation can be intense, it is typically momentary and followed by muscle relaxation and pain reduction.
How many sessions are typically needed for dry needling?
The number of dry needling sessions required varies based on the individual’s condition, the chronicity of the pain, and the response to treatment. A physical therapist will assess progress and determine the optimal course of care.
Can a physical therapist perform dry needling?
Yes, physical therapists who have undergone specialized training and certification are qualified to perform dry needling. This technique falls within the scope of practice for many physical therapists in various jurisdictions.
Sources and Scientific References
- Lara-Palomo IC et al. (2022). Electrical dry needling versus conventional physiotherapy in the treatment of active and latent myofascial trigger points in patients with nonspecific chronic low back pain. Trials. 23:238. DOI | PubMed
- Valera-Calero JA et al. (2022). Efficacy of Dry Needling and Acupuncture in Patients with Fibromyalgia: A Systematic Review and Meta-Analysis. Int J Environ Res Public Health. 19. DOI | PubMed
- Gattie E et al. (2017). The Effectiveness of Trigger Point Dry Needling for Musculoskeletal Conditions by Physical Therapists: A Systematic Review and Meta-analysis. J Orthop Sports Phys Ther. 47:133-149. DOI | PubMed
- Dach F et al. (2023). Treating myofascial pain with dry needling: a systematic review for the best evidence-based practices in low back pain. Arq Neuropsiquiatr. 81:1169-1178. DOI | PubMed
- Ma X et al. (2024). Therapeutic Effects of Dry Needling on Lateral Epicondylitis: An Updated Systematic Review and Meta-analysis. Arch Phys Med Rehabil. 105:2184-2197. DOI | PubMed