The lumbar spine is a part of the spine rich in compensatory capacity, it can compensate for the deformity of the lower limbs, but also can compensate for the deformity of the spine itself, so its ligaments and joints are easily subject to strain, resulting in lumbar and leg pain. [Treatment measures] Prevention is the mainstay, and those who are combined with trauma can be treated as acute traumatic spinal lower back pain. The root cure is to correct the shortening of the lower limbs or other deformities, to remove the causes of poor posture. For patients with deformities that cannot be cured, it is better to participate in less walking work to prevent the occurrence of postural dyskinesia. [Etiology] There are many causes of postural low back pain, such as various congenital or acquired deformities of the lower limbs. Commonly, there are congenital or acquired dislocation or ankylosis of the hip joint, shortening or developmental deformity of one limb, congenital or acquired deformity of the spine, spinal tuberculosis, bone fracture, all kinds of congenital or acquired scoliosis, and youthful hunchback and so on. In order to obtain the balance of the trunk, make the line of gravity not exceed the center of gravity, and at the same time compensate for the shortening of the lower limbs, the lumbar vertebrae must often change the original curvature, increase the lumbar vertebrae physiological anterior protrusion or lateral curvature, in order to compensate for the shortcomings of the posture. So the patient gradually feel lumbar pain, chronic strain lower back pain, and even produce lumbar spine traumatic arthritis. 【Clinical manifestations】 Early pain in the lumbar region during activities, reduced after resting, and then the lumbar pain is aggravated when starting activities after resting, and must continue to move slowly for a few minutes before it can be alleviated. However, if the activity is a little longer, the pain in the lower back is too weak to continue working. No matter in any position can not adhere to too long, if necessary, often change position. Symptoms continue to aggravate, the feeling of lumbar muscle tension, functional limitations, and even lumbar activity difficulties. Mild trauma can aggravate the existing lower back pain. Auxiliary examination: The lumbar spine loses its inherent physiological curvature, lumbar scoliosis, physiological anterior protrusion increases, the intervertebral space is narrowed, the edge of the vertebral body has lip hyperplasia, the bone density is thickened, and even the upper and lower spurs are connected, resulting in the ankylosis of the spinal column.