Low-level laser therapy (LLLT), also known as cold laser therapy or photobiomodulation, is a non-invasive treatment that uses low-level lasers or light-emitting diodes to stimulate cellular function. This therapy is used to promote tissue repair, reduce inflammation, and relieve pain. LLLT operates on the principle of photobiomodulation, where specific wavelengths of light are applied to the body to elicit biological responses at the cellular level.