Do you think an infared or LED (red-emiting diodes are the best) device would be the solution to treat the pain? I had a shoulder problem for some time and used both devices at different times; I would get relief for several hours. Then over time the injury healed. With infared you would want a means of adjusting the heat. LED of course does not emit heat, but it does offer some relief. Btw, I used the infared device more frequently.
I don't know if my post will help, but I just wanted to share some of my experience.