People with back pain should sleep on a relatively hard mattress, this is because a relatively hard mattress is not easy to deformation, when people sleep on it is more in line with the physiological curvature of the human spine, the muscle forces on both sides of the spine will be more balanced. If you sleep on a soft mattress, easy to deformation of the spine and muscle force imbalance, but will be easy to produce pain, but too hard mattress is also easy to muscle or soft tissue caused by obvious compression, after sleep will also appear more obvious back pain, so back pain is best to sleep on a hard mattress. In addition, it is best to take a flat position or a more standard side lying position when sleeping, so that the muscles of the low back can be in a more balanced state.