I get the very EXACT systems on my lower back while lying down in bed at night. Once my lower back gets up to 200 degrees, i cannot lie there in that position anymore. My remedy: Buy two or three "Chill
Pillows" from chillpillow.com and lie ontop of them. alternate them throughout the night, since each one will eventually become hot too.I prechill them in the refrigerator for a half hour first for best results. Good Luck.I am thinking it may be Fibromylagia.?