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What is Laser or Light Therapy?

The word "LASER" is an acronym for Light Amplification by Stimulated Emission of Radiation.  Laser Therapy or "photobiomodulation", is the use of specific wavelengths of light (red and near infrared) to create therapeutic effects. These effects include improved healing time, pain reduction, increased circulation, and decreased swelling.

The biological effects of Low Level Laser Therapy (LLLT) have been shown to significantly accelerate and enhance the body's natural defense and repair abilities when injured.
By reducing the duration of inflammation as well as enhancing specific repair and healing process, LLLT has been proven to provide pain relief and reduce damage due to the injury and loss of function.

LLLT enables the body to have a more rapid repair and stronger tissues once healed.


Low Level Laser Therapy has been successfully used to treat a wide variety of conditions such as:

  •   acute and chronic pain
  •   repetitive-use disorders such as carpal tunnel syndrome
  •   soft tissue strains and sprains
  •   inflammation

Unlike high power lasers that use heat and destroy tissue, low energy lasers affect the cellular energy of the underlying tissue. Hot lasers have a thermal effect and have an output of 1 MW or above.  Cold or Low Level Lasers do not have a thermal effect on tissue.  Lasers that stimulate biological function have an output under 10 milliwatts.

Low Level Laser Therapy refers to the modality of applying a "low" energy or "low level" laser to tissue that stimulates cellular processes and thereby enhances biochemical reactions. For example, studies show that LLLT increases ATP production in the mitochondria of the cell.  This increase in energy allows the cell to function more efficiently. 

Treatment times can vary in time from seconds to minutes depending on the condition.  Studies show that there may be a dose-dependent response, so it may be more effective to treat multiple times at lower doses than to treat a single time with a high dose. 

Length of treatment varies with the condition as well. For instance, an acute soft tissue injury or open wound may require multiple short treatments initially with increasing intervals between treatments as the condition improves.

Has effectiveness been demonstrated scientifically?

Yes. There are thousands of published studies demonstrating the clinical effectiveness of laser therapy and zero side effects.  Among these, there are more than one hundred rigorously controlled, scientific studies that document the effectiveness of laser for many clinical conditions.

For more information about K-Laser: www.k-laserusa.com/your-k-laser/patients

K-Laser Patient Education Video from K-LaserUSA on Vimeo.