Back pain lying down, standing up does not hurt, may be due to the following reasons: 1, may be the existence of mild vertebral slippage reasons, this type of disease is often due to the existence of some genetic factors of the patient’s influence, or acquired trauma, resulting in the isthmus of the lumbar vertebrae fracture, at this time there may be instability of the vertebral body. When the patient is lying down, the relaxation of the muscles of the lumbar region makes this instability very obvious, which in turn induces pain. The painful symptoms will be greatly relieved when the patient is standing due to the muscle tension in the lumbar region.2. This condition may be caused by lumbar muscle strain, often saying a common saying, standing is not too painful for the lumbar region, in fact, in the initial description of this situation. Because in the process of standing, the lumbar spine is in a normal physiological bend, at this time the muscles of the lumbar region, although the force, but not fatigue. The pain is caused by the spasm of the muscles of the lumbar region when the patient is lying down.3. This condition may also be caused by the fracture of some small attachments of the spine, such as the fracture of the spinous process or the transverse process, which may occur when the fracture end is stimulated by pulling while lying down, resulting in pain. When the patient is standing, the pain is greatly reduced because this irritation is significantly lessened.