most people sleep in a position that makes their problem worse. chicken or egg deal.
do not sleep on your stomach. here's why. your neck is turned to one side, this means that while your sleeping, your muscle's relax. your muscles protect your ligaments, if your head is turned to end range while you are sleeping, it stretches your ligaments. If your ligaments are stretched out, your neck becomes unstable, and therefore, less force can do MORE damage. WORST place to do it too, neck is the most important place in the spine, because that's where all the nerves come out of your brain.
You are making yourself prone to injury if you sleep on your stomach.
hammock is also bad, it reverses your spinal curve in your neck and lumbar spine, this causes tons of postural problems, won't go there now. no time