Low level laser therapy (LLLT) is the application of light (usually a low power laser) to a pathology to promote tissue regeneration, reduce inflammation and relieve both acute and chronic pain.
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.