Low-level laser therapy (LLLT) refers to the use of a red-beam or near-infrared laser with a wave-length between 600 and 1000 nanometers and power from 5 to 500 milliwatts. Low-level lasers do not produce heat. In contrast, lasers used in surgery typically use 300 watts and burn the tissues they encounter. LLLT is also referred to as cold laser therapy, low-power laser therapy (LPLT), low-intensity laser, low-energy laser therapy, and monochromatic infrared light energy (MIRE) therapy.

When administered to so-called "acupuncture points," the procedure may be called "laser acupuncture." The providers include physicians, chiropractors, physical therapists, and occupational therapists, but devices are also marketed for long-term use at home.

 

The use of LLLT was initiated in the 1960s by a Hungarian physician named Endre Mester. The devices have been advocated for use in wound healing; smoking cessation; tuberculosis; temporomandibular joint (TMJ) disorders; and musculoskeletal conditions such as carpal tunnel syndrome, fibromyalgia, osteoarthritis, and rheumatoid arthritis. The recommended dosage, number of treatments, and length of treatment vary from one device to another.

 

Anodyne's Web site states its device is prescribed by more than 11,000 physicians and has been the subject of 19 published studies. Studies also exist for a few other devices. The scientific consensus is that no LLLT has been proven more effective for pain than any other form of heat delivery. Some benefits have been reported, but the studies have been too small and/or too short to draw firm conclusions. The best-designed study of diabetic patients with sensory nerve impairment of the feet found that 90 days of Anodyne therapy at home brought about no more improvement in peripheral sensation, balance, pain, or quality of life than sham therapy.