Dry needling versus manual therapy in patients with mechanical neck pain: a randomized control trial

Key points

1. 01Manual therapy plus exercises exceeded the minimal clinically important difference on all outcomes at every follow-up point
2. 02Dry needling plus exercises produced gains by discharge but those gains partially reversed by the 3-month follow-up
3. 03Both groups improved on all primary and secondary outcomes with no major adverse events
4. 04Patients in the manual therapy group attended fewer post-discharge visits and had a shorter total treatment duration
5. 05Deep neck flexor endurance showed no significant between-group difference at discharge

How it was conducted

Design

Single therapist-blinded randomized controlled trial (parallel, 1:1 allocation), conducted at 4 outpatient physical therapy clinic locations

Participants

78 adults (mean age 50, SD 13.81) with a primary complaint of mechanical neck pain; MT+Exercises n=40, DN+Exercises n=38

Interventions

7 sessions over a maximum of 6 weeks, 30 minutes each. MT group received thrust spinal manipulation and nonthrust cervical mobilization followed by 15 minutes of exercises. DN group received dry needling to 5 posterior cervical and thoracic muscles (10-20 trigger point sites) followed by 15 minutes of the same exercises.

Primary outcome

Neck Disability Index (NDI, 0-100 scale; higher = worse)

Secondary outcomes

Numeric Pain Rating Scale (NPRS), Patient-Specific Functional Scale (PSFS), Fear-Avoidance Belief Questionnaire (FABQ-PA and FABQ-W), Deep Neck Flexor Endurance Test (DNFET), and Global Rating of Change (GROC)

Follow-up

Baseline, 2 weeks, discharge (7th session), and 3 months post-discharge

What they found

• Significant group-by-time interaction favoring MT+Exercises was found for the primary outcome NDI at all 3 follow-up time points (2 weeks, discharge, and 3 months), all p<.001
• Significant between-group differences favoring MT+Exercises were observed on NPRS at all 3 time points (2 weeks, discharge, and 3 months), all p<.001
• PSFS showed significant between-group differences favoring MT+Exercises at all time points (2 weeks, discharge, and 3 months), all p<.001
• GROC scores were significantly higher in the MT+Exercises group at 2 weeks, discharge, and 3 months (all p<.001)
• Both FABQ-PA and FABQ-W subscales showed significant between-group differences favoring MT+Exercises at all time points (all p<.001)
• DNFET improved significantly from baseline to 2 weeks in both groups (p<.001) but showed no significant between-group difference at discharge
• MT+Exercises group attended significantly fewer post-discharge visits (mean 2.14) compared to DN+Exercises (mean 3.43), p<.001
• DN+Exercises group showed reversal of improvements on NDI, NPRS, PSFS, and GROC between discharge and 3-month follow-up
• 73 of 78 participants (94 completed 2-week follow-up; 68 completed follow-up at discharge; 61 (78.20%) completed 3-month follow-up
• No major adverse events occurred in either group; minor adverse events (soreness, pain during treatment) were more frequent in the DN+Exercises group

Limitations

• Blinding of treating therapists and patients was not possible due to the nature of the interventions, introducing performance and detection bias
• Only patients with mechanical neck pain were enrolled, limiting generalizability to other neck pain categories such as cervicogenic headache, radiculopathy, or movement coordination impairments
• Home exercise compliance was not formally recorded, which may have confounded results
• DN was applied only to posterior cervical and thoracic muscles; muscles such as sternocleidomastoid and scalenes were excluded, potentially missing relevant trigger point sources in some patients

Why it matters

For patients

Patients with mechanical neck pain are more likely to experience greater and more lasting relief with manual therapy and exercises than with dry needling and exercises, and may need fewer follow-up visits after formal treatment ends.

For clinicians

Clinicians should generally prioritize manual therapy over dry needling when treating mechanical neck pain, consistent with current guidelines, while noting that dry needling gains may not persist past discharge without continued management.

For readers

This well-controlled RCT provides the most direct head-to-head comparison of manual therapy versus dry needling combined with exercises for mechanical neck pain, with results consistently favoring manual therapy across all measured domains at both short- and intermediate-term follow-up.