Cold laser therapy, also known as low-level laser therapy (LLLT) is a non-invasive medical treatment that uses low-intensity laser light to stimulate healing by reducing pain and inflammation in the body. Cold laser therapy operates at wavelengths that do not produce heat and therefore do not cause tissue damage.

During a cold laser therapy session, a handheld device emitting low-level laser light is applied directly to the area of the body being treated. The light penetrates the skin and is absorbed by cells within the tissue, where it stimulates cellular processes that promote healing and reduce inflammation. This can include increased production of ATP (adenosine triphosphate), the energy currency of cells, as well as the release of endorphins, which are natural pain-relieving chemicals. Cold laser therapy is considered safe and painless, with minimal side effects.