Why You Get Neck Pain From Sleeping Wrong (and How to Fix It)
Neck pain from sleeping wrong is often caused by muscle strain. This may be the result of sleeping on the stomach, using a pillow that's too high, an injury, or sleep issues. If you wake up with neck pain, treatments include cold or heat therapy, stretching, massage, and over-the-counter pain relievers. Sleeping in a neutral position can help prevent neck pain in the future.
Source: Verywell Health