Sometimes i get a cold feeling in lower back, most on one side. aches & makes me feel restless, can't relax & need to move & only heat helps.any idea?

Yes: There are quite a few things that could be causing your symptoms. The best way to find out exactly what is responsible us to have you properly assessed by your doctor. So give him/her a call as soon as you can. Good luck.

Massage or yoga: Lower back pains are often due to muscle cramps. You may want to consider a yoga class or a massage and see how it feels. If the pain persists for weeks with no improvement, you should see your primary care provider about it, to evaluate for other causes.