PBM Light can be used on virtually any surface of your body, but is particularly effective on inflamed joints and arthritic pain in hands, elbows, knees and ankles, fatigued muscles, TMD and TMJ (jaw and facial) pain, osteoarthritis and oral mucositis, sore muscles like shoulders, neck, back, wrists and achy hands and knees. The oral cavity benefits greatly from PBM Light, treating canker sores, abrasions, cold sores etc. This red infrared light therapy device can also be used for tennis elbow, swimmer’s shoulder, runner’s knee, ankle sprains, carpel tunnel syndrome, sprained ankles, plantar fascitis and even mild traumatic brain injury.