I used to use Thermacare pain patches for the neck and low back in 2003 and worker com paid for them. I decreased my pain medication. When I started with skin breakdown, no longer could I use them. Now I use Teracin pain patches that are much smaller (menthol---cool, lidocaine---numb, and capsaicin but doesn't burn), and do have to change skin sites because my skin will start to become sensitive with continued application. Thermacare is heat and now the cool works better for my nerve pain also. Best of luck!