Laser is an acronym that stands for light amplification by stimulated emission of radiation. In other words, it’s a special kind of light. At various strengths, laser light has different effects. Higher-strength lasers can be used to make clean surgical incisions. Alternatively, low-level lasers, the kind used in cold laser therapy, permeate soft tissues at the cellular level, where they trigger photochemical and photothermal reactions. These reactions have been shown to be highly beneficial in clinical settings.