In 1986, Choy DS and Ascher first applied percutaneous intervertebral disc laser vaporization and decompression surgery to treat lumbar disc herniation in the clinic, and achieved good results. 1998, Choy reported the results of 8-12 years of long-term follow-up, the total effective rate of 82%, with less than 1% of complications. The principle is: use the high energy of laser to vaporize a certain amount of nucleus pulposus tissue, reduce the internal pressure of the intervertebral disc, and make the protruding disc tissue retract, so as to reduce its compression on the nerve root, and to achieve the effect of symptomatic relief.The indications of PLDD are mainly for cervical vertebrae: there is a cervical disc protrusion on the imaging, and it matches with the clinical signs, and the neurogenic symptom is obvious, lasts for 2 months, and the conservative treatment is ineffective, and the intervertebral discography Can induce pain, anesthetic injection into the disc has a more satisfactory analgesic effect, sympathetic cervical spondylosis, prohibited for spinal cervical spondylosis; lumbar spine: lumbar disc herniation on imaging, and consistent with clinical signs, conservative treatment is ineffective for 6 weeks, the pain is not long, discography can induce pain, anesthetic injection into the disc has a more satisfactory analgesic effect.