Two years ago, I had a severe rotator cuff injury in my left shoulder. I was in a great deal of pain, had little range of motion and was getting little sleep. I started laser light therapy at Alberta Laser Rehabilitation Centre. After two treatments I finally managed four hours of sleep. After the fourth treatment the pain was manageable and slept that night. After the sixth treatment I was pain-free. I had nearly full range of motion after the 12th treatment and had no recurrent pain. This is a wonderful drug free treatment for pain!!!