Can Red Light Therapy Ease Fibromyalgia Pain? What a Meta-Analysis of 9 Trials Found

Fibromyalgia is notoriously hard to treat, with most drug options offering modest relief at best — so a light-based therapy with a large, statistically robust effect size across multiple trials is worth a close look.

What the research looked at

Published in Pain Physician in 2019, this systematic review and meta-analysis pooled data from 9 randomized controlled trials covering 325 fibromyalgia patients. The included trials compared low-level laser therapy against placebo or sham treatment, measuring outcomes across pain intensity, physical function (using the Fibromyalgia Impact Questionnaire), fatigue, depression, and anxiety.

What they found

Low-level laser therapy produced large, statistically significant effect sizes across every outcome measured: pain, physical function, fatigue, depression, and anxiety all improved significantly more with laser therapy than with placebo or sham treatment. The authors concluded that low-level laser therapy is an effective, safe, and well-tolerated treatment option for fibromyalgia.

What this means in practice

A meta-analysis of 9 randomized trials is a meaningfully stronger form of evidence than any single trial, and consistent, large effects across pain, function, fatigue, and mood is a genuinely encouraging pattern. That said, fibromyalgia trials are notoriously hard to blind effectively (patients can often tell if a laser is on), individual trials in the pool were relatively small, and treatment protocols varied across studies. This is one of the more promising applications of light therapy for chronic pain, but it should complement — not replace — a fibromyalgia treatment plan developed with a doctor.