I am not in the medical field however my husband and I have had chronic joint pain for years. He has had bad knees that required use of knee braces and I have had hip joint pain. We started using red light therapy and it has made an incredible difference in our lives. He no longer has had to use the knee braces ( for 3months now) and I no longer have the sever hip pain. I have no idea how it works but have had several people and even our dog who have started using it and most have seen a dramatic change. It may not work on everyone but it has worked on the people and animals I have known that used it so it is worth a try. It may take several sessions to see such dramatic improvements and we use them regularly to stay ahead of the pain but as I said it's worth a try.