Low-level laser therapy (LLLT) is a form of alternative medicine that applies low-level (low-power) lasers or light-emitting diodes (LEDs) to the surface or orifices of the body. Whereas "high-power" lasers are used in laser medicine to cut or destroy tissue, low-power lasers are claimed to relieve pain or to stimulate and enhance cell function.
The effects of LLLT appear to be limited to a specified set of wavelengths of laser,[1] and administering LLLT below the dose range does not appear to be effective.[2]
Despite a lack of consensus over its validity, some studies suggest that LLLT may be modestly effective, but in most cases no better than placebo, in relieving short-term pain for rheumatoid arthritis,[3] osteoarthritis,[4] acute and chronic neck pain,[5]tendinopathy,[1][6] and possibly chronic joint disorders.[2] The evidence for LLLT being useful in the treatment of low back pain,[7][8] dentistry[9][10] and wound healing is unclear.[11]
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