Alternative & complementary remedies: what the evidence says
Red Light Therapy for Joints: Early Science, Big Marketing
4-minute read · Published April 16, 2026 · Updated April 16, 2026
What it is
Red light therapy uses low-level red or near-infrared light, usually from a panel or handheld device. The idea is that light may affect cells in the tissue it reaches. Some marketing says it reduces inflammation or speeds healing. Those claims go further than the human evidence we have.
What the research says
Much of the excitement comes from lab and animal work. Lab results do not always carry over to people. There isn't strong research on red light therapy for shoulders, so the evidence is best described as early.
The better-tested non-drug options for shoulder pain look different. Exercise is the most studied. Progressive, resisted exercise probably makes a modest difference rotator-cuff-related shoulder pain, while gentle unloaded movement probably does not [R01]. Acupuncture for shoulder pain has been studied in small trials, with results about the same as sham at two to four weeks, so the evidence is not strong enough either way [R24].
What you can do
- Ask what the device is for. Find out what the company claims and what independent evidence supports those claims.
- Ask a clinician. A physiotherapist or doctor can tell you whether light therapy is worth considering for your shoulder.
- Keep moving gently. Pain-free movement is a sensible base while you find out more. The routines page is a general reference once a clinician says gentle movement suits you.
- Don't pay for a delay. A painful shoulder that persists should be assessed, not treated with a device alone.
- Be wary of guarantees. A claim that a device will "fix" or "heal" a joint is a red flag.
Where ShoulderBack Pro fits — and where it doesn't
This topic is outside what a movement trainer can help with. For shoulder pain, the better first step is a conversation with a clinician about the cause and the options.
When to see a professional
A doctor or physiotherapist diagnoses shoulder problems. Do not wait for a device to work before you get that assessment.
See a doctor or physiotherapist promptly if you have: pain after a fall or injury with sudden weakness or loss of movement; a shoulder that looks deformed, very swollen or bruised; fever or feeling unwell alongside the pain; chest pain or breathlessness (call emergency services); constant pain that doesn't change with rest or activity; pain that wakes you most nights; numbness, tingling or weakness into the arm or hand; pain in several joints at once; or pain that hasn't improved after a couple of weeks of sensible self-care.
Try this movement
Greet the Morning (seated) ritual →Frequently asked questions
Does red light therapy work for shoulder pain?
The evidence in people is early and limited. Ask a clinician whether it is worth considering for your situation.
Is it safe to try?
Safety depends on the device and your health. Ask a clinician first, especially if you have a condition or take medication.
What should I do instead while I wait?
Gentle, pain-free movement and an assessment by a doctor or physiotherapist are usually better first steps.
Sources
- Cochrane (Green S et al., 2005; edited, conclusions unchanged). Acupuncture for shoulder pain. CD005319. https://www.cochrane.org/evidence/CD005319
- Naunton J et al. (2020). Effectiveness of progressive and resisted and non-progressive or non-resisted exercise in rotator cuff related shoulder pain: systematic review and meta-analysis of RCTs. Clinical Rehabilitation. https://search.pedro.org.au/search-results/record-detail/61404
More in this topic
Essential guide: Alternative Remedies for Shoulder Pain: What the Evidence Says About Each
Over-the-Counter Pain Relief: Acetaminophen vs NSAIDs for Shoulder Pain
PRP and Stem-Cell Injections for Shoulders: Expensive, Uncertain
Shockwave Therapy for Calcific Shoulder Tendinitis: One of the Better-Supported Options