Backward protrusion of lumbar disc belongs to the central type of lumbar disc protrusion, which refers to the protrusion of the intervertebral disc from the center of the back of the spinal canal and compression of the spinal cord, mainly caused by excessive bending and weight-bearing or prolonged desk work, which can cause degeneration of the lumbar intervertebral disc and degeneration of the fibrous ring and easily cause protrusion of the lumbar disc. If it protrudes backward and does not compress the spinal cord, it can generally be treated conservatively, trying to improve bad habits and using anti-inflammatory and pain-relieving drugs to treat the symptoms. If the central protrusion is heavy, compressing the spinal cord and causing the lower limbs to lose muscle strength and walking instability, it is recommended that surgery be performed as soon as possible to remove the protruding disc so that the compression of the spinal cord can be completely eliminated.