Despite a lack of consensus over its scientific validity, specific test and protocols for LLLT suggest it 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]