Are you looking for the best mattress for side sleepers with lower back pain or hip pain? Check out this post to buy a mattress for side sleepers picked by our sleep experts. Sleeping on your side is a typical and healthy way to sleep. This sleeping posture allows your spine to rest in a natural position. If you sleep on your side and also have the incorrect mattress, it may result in shoulder pain or hip pain. A good mattress for side sleeping should conform to your body.