Pain below the lumbar region is often caused by the following reasons: 1. Vertebral slippage may exist, often seen in patients due to congenital hereditary factors or acquired excessive activity, resulting in a fracture of the isthmus of the lumbar spine, at which point lumbar instability can occur. When the patient is doing strenuous activities, it may lead to the relative sliding of the lumbar spine, at which time there will be obvious lumbar pain. 2, there may be lumbar spine-related injuries. For example, if a patient has an acute lumbar sprain or a lumbar spine related fracture, it will lead to significant pain in this area. 3. It may be caused by a herniated lumbar disc, often seen in patients with prolonged heavy weight bearing or prolonged sitting or standing, which leads to rupture of the lumbar disc fibrous ring and protrusion of the nucleus pulposus, resulting in lumbar pain and radiated pain in the lower extremities. 4. It may also be Spina bifida. Such diseases are often due to congenital developmental factors, resulting in incomplete closure of the spinal canal in the posterior, such patients often feel painful symptoms in the lumbar region when moving later in life.