Low Level Laser Therapy (LLLT) or Soft Laser Therapy sometimes known as Photobiomodulation (PBM) is a low intensity light therapy that has photochemical, not thermal effects. The light triggers biochemical changes within cells and can be compared to the process of photosynthesis in plants, where the photons are absorbed by cellular photoreceptors and triggers chemical changes.

Light with a wavelength in the red to near infrared region of the spectrum (660nm–905nm), is generally employed because these wavelengths have the ability to penetrate skin, and soft/hard tissues and are proven in clinical trials to have a good effect on pain, inflammation and tissue repair. 

The laser treatment is applied to a localized site for variable time periods a few times a week for several weeks.

Apart from the risk of exposure to the eyes, soft laser therapy has few side effects and at Path to Health it is used as an adjuvant therapy for pain relief in patients with musculoskeletal and neuropathic pain