We’re often asked here in Sandycove Physiotherapy Clinic what the best sleeping position is. Sleeping on your stomach is a leading cause of neck pain and degeneration.
It places the structures in your neck under excessive pressure at end range rotation for sustained periods of time. It may also lead to lower back and upper limb issues. This helpful article gives further advice http://www.health.harvard.edu/pain/say-good-night-to-neck-pain