I m trying to get some rest before I go to work tonight, but my lower back between the top of hip bone to where the rib cage starts feels like it is under a ice bath. I m under a blanket and still I m still shaking, not a lot moment, just enough to notice. I feel no pain but tightness around the spiral column and very strong coldness about mid way. It s feels weird. I like the cold to sleep but not this much. Heating pad doesn t help, the heat doesn t go deep enough. The coldness is about 3 to 4 deep.I did it s weird.