I'm a 49 yr old male with chronic lower back pain due to mild degenerative disk condition. I have managed pain and avoid spasms with a daily stretching routine and exercise. However, EVERY evening I wake up in the middle of the night with an extreme-painful-freezing-cold-sensation coming from my lower spine and it points out to L4 L5 or L5 S1. The only way I can go back to sleep is by wrapping a heating pad which gives me immediate relief as heat takes over. It has nothing to do with sleeping positions, room temperature, weather or any other influence. During the day I have no such pain sensation. I have searched everywhere for an answer but nothing so far. Please help anyone????