Many stomach sleepers experience some type of pain. Whether it is in the neck, back, or joints, this pain can affect how much sleep you get each night. If you suffer from pain during your sleep you are more likely to wake up during the night and feel less rested in the morning. Sleeping on your stomach causes your back to flex unnaturally and strains your spine and ligaments, which makes it difficult to maintain a neutral position when you are sleeping. If you cannot comfortably fall asleep in any other position, place a pillow underneath your chest to help reduce the strain on your back.