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Low Level Laser Therapy

The term Laser is the acronym for Light Amplification by Stimulated Emission of Radiation. A laser light is monochromatic, collimated, and coherent. A laser  is a device that produces such a light. Low level laser therapy (LLLT) is used by some physiotherapists to treat various musculoskeletal condition. LLLT is a non-invasive light source treatment that generates a single wavelength of light. It emits no heat, sound, or vibration. It is also called photobiology or biostimulation. LLLT is believed to affect the function of connective tissue cell, accelerate connective tissue repair and act as an anti-inflammatory agent. Lasers with different wavelengths, varying from 632 to 904 nm, are used in the treatment of musculoskeletal disorders.


The effects of the LLLT which are significant for physiotherapy, and makes this tool useful to enhance other treatments as therapeutic exercise, are:

  • Reduction of inflammation: It can occur within hours to days.
  • Pain relief
  • Accelerated tissue regeneration: LLLT stimulates cell proliferation of fibroblasts , keratinocytes , endothelial cells  and lymphocytes.