Lower back pain when lying down is due to strain or pull on the muscles of the lower back. When standing or sitting and in other positions, the lumbar muscles will not be stretched, so there will be no pain, when lying down the lumbar muscles are in a state of tension, there will be pain symptoms. Therefore, in this case, when sleeping flat on the ground, should let the lumbar muscles to maintain a state of relaxation, so first of all, the mattress should be replaced with latex pads, because latex pads have a very good role in molding. After lying flat and the waist of the physiological curve of the exact match, there will be no muscle pull and strain, can effectively relieve the pain. And in the lying position in the double knee joints and calves of the following pad quilt, so that the waist in a relaxed state, muscle relaxation will not appear after the pain, and sleep at night time must pay attention to avoid being cold, pay good attention to the waist of the warmth is also very important.