If your neck has hurt for months, the most useful thing you can hear is not that something might help — it is which things have actually been tested in randomized trials, and what those trials measured. For persistent neck pain, that list is short, and it is genuinely encouraging.
At Venturis Clinic in Oklahoma City, neck pain is one of the problems we see most often. This article walks through the options that have randomized controlled trial support behind them, where light therapy fits as an adjunct alongside them, and how we decide whether someone is a good candidate.
First, the part most people skip
Persistent neck pain is rarely one thing. The neck carries the weight of the head through a small, mobile set of joints, supported by muscles that fatigue quickly when posture, work setup or sleep position asks too much of them. Add a sedentary job, a long commute, or an old whiplash injury, and the pattern that shows up in clinic is familiar: stiffness that is worst in the morning, a band of ache across the shoulders by mid-afternoon, and a narrowing range of motion that the person has slowly stopped noticing.
Because the drivers are layered, the treatments that hold up best in trials are the ones that address load and capacity — not the ones that only address the sensation. That is why our neck plans start with assessment and movement, and why anything else is described here as an addition to that, never a replacement for it.
Movement and strength: the foundation
Graded exercise and strengthening for the neck and shoulder girdle is the component with the broadest support in mainstream guidance, and it is where we spend most of a patient’s effort and most of our clinical attention. It is also the part that keeps working after the course of care ends, because what changes is the tissue’s capacity rather than the day’s pain score.
This is unglamorous work. It involves specific, progressive loading, done consistently, for longer than most people expect. The honest framing is that it is the treatment, and everything else in this article exists to make it possible to do.
Where light therapy fits
Photobiomodulation — low-level laser therapy applied to the painful sites — has been studied in neck pain more carefully than most people realize, and the results are among the better ones in the whole field.
A systematic review and meta-analysis published in The Lancet pooled 16 randomized controlled trials covering 820 patients. In acute neck pain, two trials gave a relative risk of pain improvement of 1.69 against placebo. In chronic neck pain, five trials reporting categorical outcomes gave a relative risk of 4.05. Across the 11 trials that reported change on a 100 mm visual analogue scale, pain intensity fell by 19.9 mm.
The finding we think matters most to patients is the follow-up one. Seven of those trials followed people after the treatment course had finished, and the pain relief persisted up to 22 weeks after the last session. Side effects were mild and no different from placebo.
That durability is the reason we use it the way we do: as an adjunct that lowers pain enough, for long enough, that the strengthening work becomes achievable rather than aspirational. We have written about this evidence in more depth in Neck Pain and Low-Level Laser: What 16 Trials Found, and about the underlying mechanism in What Photobiomodulation Actually Is.
The precision that belongs with those numbers
The effects above are real, modest and adjunctive, and the evidence behind them sits at low to moderate certainty rather than at the top of the scale. A 2025 umbrella review in Systematic Reviews looked across 15 meta-analyses, 204 randomized trials and more than 9,000 participants, found significant effects for 12 health outcomes, and judged five of them to reach moderate certainty — while calling for further high-quality trials and for standardization of treatment parameters before widespread clinical adoption. Device settings, wavelength and dose vary meaningfully between the trials in the neck-pain pooling, which is part of why candidacy and parameters are assessed individually here rather than applied from a single protocol. Photobiomodulation is not FDA-cleared for neck pain, and we say so to every patient who asks about it.
None of that changes the direction of the evidence. It changes what we promise: a well-supported adjunct with a measurable effect that lasts past the end of treatment, used alongside the loading programme that does the structural work.
How we decide whether you are a candidate
Four questions shape the answer.
How long has it been going on?
Acute and chronic neck pain behaved differently in the pooled trials, and they behave differently in clinic. Recent-onset pain often needs reassurance, gentle movement and time more than it needs anything we can add. Pain that has outlasted three months is where an adjunct earns its place.
Is the pain mechanical?
Pain that changes with position, load and time of day is the pattern that responds. Pain that is unrelenting, that wakes you from sleep every night, or that comes with progressive weakness, numbness in the hands, unsteadiness, or unexplained weight loss is a different conversation, and it is one that starts with a diagnostic workup rather than a treatment plan.
Can you do the exercise?
If the answer is no — because the pain is too high, or because previous attempts have flared it — then an adjunct that brings the pain down has somewhere useful to go. If the answer is yes and you are not doing it, the honest recommendation is to start there and save your money.
What else is driving it?
Workstation setup, sleep position, headache pattern, jaw clenching, stress load and prior injury all change the plan. We ask about them before we treat, for the same reason we ask about the shoulder before we treat it: the history determines whether a treatment is likely to do anything at all.
What a course of care looks like
A typical plan runs several weeks, with sessions clustered early and tapering as the loading programme takes over. We score pain and range of motion at every visit, on the same scale each time, so that the decision to continue or stop is made against a number rather than a feeling. If the numbers are not moving by the point in the course where the trials saw movement, we say so and change the plan.
We also tell people what we are not offering. We do not treat neck pain with injectable preparations on the basis of the evidence described in this article, and we do not present adjunctive light therapy as a substitute for a surgical or neurological opinion when the examination calls for one.
When to get seen sooner
Neck pain with progressive arm weakness, loss of hand dexterity, changes in balance or walking, bowel or bladder changes, severe pain after a significant injury, fever, or unexplained weight loss needs urgent assessment, not a course of adjunctive treatment. These are uncommon, and they are worth knowing anyway.
The short version
Strength and graded movement are the treatment. Adjunctive photobiomodulation has randomized trial support in neck pain, including relief that persisted up to 22 weeks after treatment ended, which makes it a reasonable addition when pain is the thing standing between a patient and the exercise. Candidacy is individual, the certainty of the evidence is low to moderate, and anyone who tells you more than that is telling you more than the trials support.
References
Chow RT, Johnson MI, Lopes-Martins RAB, Bjordal JM. Efficacy of low-level laser therapy in the management of neck pain: a systematic review and meta-analysis of randomised placebo or active-treatment controlled trials. Lancet 2009;374(9705):1897–1908. PMID 19913903. doi:10.1016/S0140-6736(09)61522-1
Son Y, Lee H, Yu S, et al. Effects of photobiomodulation on multiple health outcomes: an umbrella review of randomized clinical trials. Syst Rev 2025;14(1):160. PMID 40770824. doi:10.1186/s13643-025-02902-3
Citation records retrieved from PubMed.
Disclaimer
This article is general education, not medical advice, and it is not a substitute for evaluation by a qualified clinician. It does not establish a physician–patient relationship. Individual results vary, and the studies described report group averages rather than what any one person should expect. Treatments discussed may not be FDA-cleared or approved for the conditions mentioned; where that is the case it is stated in the text. Talk to your own physician before starting, stopping or changing any treatment.
