I have 15 years of chronic lower back pain causeunknown and i have had shots physical therapy accupuncture other heating pads you need moist heat even my dad who had a shattered spine he unfortunately was just diagnosed with osteoperosis and was using a heating pad for relief which i was not aware of i immediately set him up with the thermalon microwave activated moist heat and despite being argumentative towards me his personality saying it was going to be the samewell did i surprise him