Pain Tip: Sleeping and Low Back Pain

Sleep positions can help reduce low back pain.  Side sleepers should pull your legs slightly toward your chest and place a pillow between your legs.  Do you sleep on your back? Try to place a pillow under your knees, as it can help maintain the normal curvature in your lower back. Finally, sleeping on your stomach can be difficult on your back. Thus, if you are a stomach sleeper, try placing a pillow under your hips.

Reference: https://www.ncbi.nlm.nih.gov/pubmed/26835867