I have bone spurs in my lower back so I know most treatments won't work well for me. I tried these in desperation along with some other products and they kind of helped numb the pain but obviously with my condition they won't work perfectly. I loved the stretch band but my biggest complaint is that the activated powder, or whatever the contents are, shifted to the bottom of the pack so it wasn't full coverage. They did take a while to heat up but by the time I take off the band my back is actually sweaty which is a good sign. I think laying on them or just applying pressure helps to feel the warmth.