Cold laser therapy or low level laser therapy (LLLT) is a treatment that utilizes specific wavelengths of light to interact with tissue and accelerate the healing process. It can be used on patients who suffer from a variety of acute and chronic conditions in order to help eliminate pain, swelling, reduce spasms and increase functionality. Cold lasers are handheld devices used by the clinician and are the size of a flashlight. The laser is placed directly over the injured area for 30 seconds to several minutes. During this time, the non-thermal photons of light that are emitted from the laser pass through the skins layers (the dermis, epidermis, and the subcutaneous tissue or tissue fat under the skin). This light has the ability to penetrate 2 to 5 centimeters below the skin at 90mw and 830 nm.