The mattress is too soft causes low back pain for the following reasons: First, the mattress is too soft causes the body to present the body flexion when sleeping, resulting in the muscles and ligaments of the waist and other soft tissues continue to be strained, in a state of tension, over time there will be excessive fatigue to form strain, which will produce more metabolites, the peripheral nerve stimulation and symptoms of lumbar pain. Second, the mattress is too soft lumbar pain may also be the case of cold, cold leads to further tension in the muscles, ligaments and other soft tissues of the waist, resulting in decreased blood circulation, metabolites further increase, aggravating the symptoms of lumbar pain. Therefore, after this situation must be replaced mattress, preferably replaced with latex pad, because latex pad has a good shaping effect, in line with the normal physiological curvature of the human body, muscles and ligaments and other soft tissues can be in a relaxed, resting state, so it is not easy to fatigue and strain, help relieve the symptoms associated with lumbar pain.