For about six months I had not been able to sleep well because of my left shoulder hurting. After two days of red light therapy it did not hurt at all and has been great (no pain sleeping) (now weeks later). Told a church friend about red light therapy who had been hurting, hard to sleep, because of shoulder hurting for two years, ever sense he picked several gallons of blueberries over head high. After about two days of red light therapy he has had no pain. I felt bad for these last two years because I told him he could pick all the over head-high blueberries because my wife couldn't reach them. I found out about red light therapy from my son's wife who bought one for her husband because of the pain in his wrist and he couldn't move it in a circular motion without great pain. After a couple of days he could move it in a circular motion, now he can without pain. I don't think he is 100% but he is pain free. All of the above happened because my granddaughter bought one for her elderly dog who was in pain and it worked. She told her mother, her mother bought one for her husband (my son) who told me, I bought one based on the positive results, and I told my church friend. We have been discussing red light therapy before class on Sunday morning and the teacher sprained his calf muscle and was on a scooter. Today he had a wrap around the calf red light devise and thinks that he has reduced his recovery time substantially. Good news travels fast when pain is relieved. Please do not use my name other than W Ellis if you use this information. I have not read the Judge.me's terms.