I have been sleeping with a small rolled microfiber hand towel under my neck when sleeping on my back, and two under my neck if on my side. It seems to be keeping nerves from getting compressed while sleeping. I no longer wake up with searing elbow pain and fingers that feel like they are plugged into an electrical light socket.

Placing pillows under yourr knees and lower legs to elevate them while you are laying supine will lengthen your lumbar spine and take pressure off lumbar nerves as well.