For most people, the wrong sleep position will be easy to spot. One of the most common signs that your sleep position isn’t for you is waking up with pangs of back pain or any other discomfort in your body.Certain sleep positions can worsen the onset of back pain. One of the worst sleep positions for back pain is sleeping on your stomach. Stomach sleeping flattens the curb of the spine and places additional pressure on sensitive muscles around the lower back. Those prone to back pain or recovering from injury are not advised to sleep on their stomach.