Low level laser therapy (LLLT) is the application of light to a pathology to stimulate wound healing and tissue regeneration, reduce inflammation, relieve both acute and chronic pain, promote healing of fractures and tendon ruptures, as well as facilitate healing in TBIs, spinal cord injuries, strokes, etc.

The use of low levels of visible or near-infrared (NIR) light for reducing pain, inflammation and edema, promoting healing of wounds, deeper tissues and nerves, and preventing tissue damage has been known for almost forty years since the invention of lasers. Originally thought to be a peculiar property of laser light (soft or cold lasers), the subject has now broadened to include photobiomodulation and photobiostimulation using non-coherent light.