Discogenic lower back pain, which is clinically extremely common, is chronic lower back pain caused by intra-disc disorders (IDD) such as degeneration, intra-fibrotic disorder, and discitis that stimulate pain receptors within the disc without radicular symptoms, without radiographic evidence of nerve root compression or excessive displacement of vertebral segments, and can be described as chemically mediated discogenic pain. The lumbar intervertebral disc consists of the nucleus pulposus in the middle and the surrounding annulus fibrosus, as well as the endplates above and below. The nucleus pulposus is mainly supplied by the infiltration of the annulus fibrosus and the end plate, and has no blood supply of its own. The innervation of the intervertebral disc is very complex, with sensory transmission mainly through the sympathetic nerve and posteriorly through the sensory fibers of the sinus nerve. The sinus vertebral nerve branches off from the lumbar nerve roots and travels into the spinal canal, dividing into finer branches that form a nerve network that innervates the posterior longitudinal ligament and the ventral dural sac. These nerve nets are characterized by left-right cross-linking and up-down cross-linking, and the posterior margins of the vertebral bodies of the intervertebral discs are innervated by the posterior longitudinal ligament nerve network. The anterior longitudinal ligament also has an upward and downward cross-linked nerve network, which originates from sympathetic nerves emanating from the sympathetic trunk. Because the nerve network is cross-linked up and down and left and right, injurious stimuli can be transmitted through the network to the spinal cord bilaterally, which is why patients exhibit pain sometimes on the left side and sometimes on the right. Moreover, the lumbar spine, including the intervertebral discs, is often co-innervated by multiple segments, making it very difficult to locate the source of pain. Since sympathetic nerves are involved in sensory transmission in the intervertebral disc, and sympathetic nerves consist of C8-L2 nerve roots, attempts have been made at the L2 level. What tests should be done for low back pain 1.CT examination It can clearly show the bone flab at the anterior and posterior edges of the vertebral body, the site and degree of pressure on the dural sac, spinal cord and nerve roots, measure the anterior and posterior diameter and transverse diameter of the spinal canal, and also understand whether the intervertebral foramen and transverse foramen are narrow and whether the vertebral plate is hypertrophic. 2.X-ray is a routine examination for patients with low back pain. -Generally, orthogonal, lateral and oblique radiographs should be taken, and lateral radiographs of the neck in forward flexion and back extension should be taken if necessary. Orthopantomographs may show narrowing of the vertebral space, osteophytes of the hook joint, and thickening of the vertebral arch. Lateral films may reveal loss of cervical physiological protrusion, formation of a bone lip at the anterior and posterior edges of the vertebral body, narrowing of the intervertebral space and narrowing of the spinal canal. The oblique film can determine the condition of the intervertebral foramen. 3, magnetic resonance can clearly show the posterior protrusion of intervertebral disc tissue, compression of the dural sac and spinal cord, as well as the presence of venous return obstruction, compression, and the presence of cystic lesions in the local spinal cord.