Cold lasers are also known as low level lasers, because they do not generate heat, unlike those used in surgery.  Cold laser therapy is the use of a visible red laser, 635 nm +/-, used for conditions closer to the skin, or near invisible 808 +/- laser, that penetrates deeper into the underlying tissue.

Cold laser therapy may affect cellular physiology through the excitation of cells by light.  Scientists have demonstrated that light can enhance communication between cells, in addition to stimulating light sensitive enzymes that play a role in several metabolic processes, including the production of ATP, collagen, and vitamin D.  Low level laser can act through this stimulatory effect, helping to improve blood circulation, stimulating peripheral nerves, fighting inflammation within involved areas of the body, and helping to hasten the healing process.

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