Infrared light therapy

Researchers study photobiomodulation because low-intensity light may influence cellular signaling and tissue responses without the deliberate heating used in thermal treatments. That mechanism gives the modality a reason to test, but a mechanism does not establish a meaningful benefit for a person.

A home-use review found encouraging results across several indications, while also concluding that more randomized trials were needed. The gap between “can change a cellular pathway” and “this home device improves my outcome” is where most of the important evaluation sits.[1][3]

An umbrella review of 15 meta-analyses and more than 9,000 participants found moderate-certainty signals for a handful of outcomes, including pain in burning mouth syndrome, disability in knee osteoarthritis, fatigue in fibromyalgia, hair density in androgenetic alopecia, and cognitive function. Most other outcomes had low or very low certainty because of heterogeneity or small-study effects.

A review focused on skin wounds found improvements in wound size, healing rate, and pain across randomized trials, but still called for higher-quality studies. This pattern is important: a promising signal in a defined clinical use should not become a claim that light therapy improves general recovery, inflammation, hormones, or longevity.[1][4][6]

A 2026 systematic review and meta-analysis of near-infrared treatment for surgical wounds reported better healing and less postoperative pain, but the certainty of evidence was very low and effects varied substantially between studies. Wavelength, session count, application technique, and anatomical site all appeared to influence results.

That variation makes product matching essential. A panel tested after surgery is not automatically equivalent to a small mask tested for skin appearance, and a home device cannot borrow a clinical result unless its exposure and intended outcome are reasonably similar.[2][4]

The FDA notes that low-level light procedures generally use low energy and do not heat the skin or fat, but it also warns that light-based procedures can injure the eyes and lists situations such as photosensitivity, pregnancy, active implants, cancer at the treatment site, photosensitizing medicines, and active infection or wounds where medical guidance matters.

Use the manufacturer’s instructions, do not assume more light is better, and look for measured output and a clearly stated intended use. A wellness device’s marketing language is not the same thing as evidence that it treats a medical condition.[3][5]