Low-level laser therapy (LLLT), utilizes light energy rather than heat energy used in laser surgery, to help relieve neck pain. Although the mechanism of action is not fully understood, LLLT has been used for a variety of disorders including wound  healing, carpal tunnel syndrome and a number of musculoskeletal disorders including tendonitis, neck pain, osteoarthritis, and ankle sprains.

Athletic trainers, chiropractors, physical therapists and practitioners of alternative medicine have been using LLLT since it was FDA approved in 2002. Because LLLT produces no heat, sound or vibration it is felt that it causes photochemical reaction in the cells and tissues that may lead to reduced inflammation and improve circulation to the affected area. 

Some studies done on carpal tunnel syndrome showed that LLLT is effective in treating mild to moderate CTS. A smaller study involving 23 patients (involving 30 hands) showed a 77% achieved complete resolution of symptoms. Overall results remain controversial with wavelength, dosage, site application and treatment duration all affecting the outcome.

Interstingly, the Department of Labor and Industries published a paper about LLLT. Click on this link for further information about the use of LLLT in treating various disorders.