i'm no doctor, but i'd say you need a new/better bed.
this. also if your a tall person like i am. DONT forget to stretch out your back every morning and drink lots of vitamin C. Vitamin C will help reduce inflammation which causes joint pain and help clear your body of lactic acid. But honestly if your bed is old try some new sheets or even a new pillow to help even out your back.
Also if it really bothers you just smoke some trees