I had surgery on my left shoulder in November last year and have had a number of physiotherapy sessions. I do daily exercises to strengthen the muscles. In spite of this I was still experiencing some stiffness and limited range of movement in the joint. Since starting home treatment with the Photizo Pain unit two weeks ago, the stiffness has disappeared and I have seen a huge improvement in the mobility of my shoulder. I also used the unit on my sinuses as I was recovering from a sinus infection and it helped to ease the congestion and associated pain. A great investment!