Disc calcification is the calcification or ossification of the nucleus pulposus or annulus fibrosus of an intervertebral disc due to degenerative changes and trauma. Disc calcification is an imaging descriptive language, usually during the lumbar spine CT examination, the imaging doctor will issue the lumbar disc calcification this statement. 1. Degenerative changes: the main reason mainly lies in the lumbar intervertebral disc degeneration for a long time, the posterior longitudinal ligament local protrusion, ischemia, poor blood circulation, calcium ion deposition, and then localized calcification, which is originally soft disc or posterior longitudinal ligament, and eventually become harder, similar to the bone, so it is called calcification. 2. Trauma: When the patient was young, the lumbar intervertebral disc was once traumatized, and the local nucleus pulposus may be ossified and calcified when recovering in the later stage. For patients with calcified discs, surgical treatment is usually more difficult accordingly. When disc calcification occurs, it is recommended to go to the hospital in time for early treatment to minimize the adverse effects of the disease.