If I sleep on my stomach I can't move my neck the next day, right side my right hand goes painfully numb, left side my left hand goes painfully numb, back both hands go numb. There is literally no position I can sleep in that I don't wake up after a couple of hours and have to shift to a different position.
Dude, my arms kept falling asleep at night. I randomly mentioned this to my physical therapist (I was there after a knee surgery) and he put me on a massage bed and pulled my head. Not like some quack chiropractor, but just slowly pulling my head, stretching my neck. Fuckin problem went away and never returned.
Closest thing to real magic I have experienced.