The target criteria for percutaneous foraminotomy disc removal are not fundamentally different from the selection criteria for conventional laminectomy disc removal. Patients selected for foraminotomy should meet the following conditions: 1. lumbar disc herniation Mechanical compression of the nerve by the herniated disc, resulting in low back pain, lumbar leg pain or claudication. 2, lumbar discogenic pain That is, the intervertebral disc is mainly degenerated and aged, the protrusion is not obvious, and the degenerated and aged disc secretes some inflammatory media, which stimulates the sinus vertebral nerve or spinal nerve root around the lumbar intervertebral disc, resulting in neuroinflammatory reaction, resulting in low back pain or low back pain, with recurrent symptoms and ineffective conservative treatment. At this time, structural damage such as tearing of the intervertebral disc’s fibrous ring may have occurred. 3, lumbar intervertebral foramen stenosis middle-aged and elderly patients with low back and leg pain, due to arthrogryposis, hypertrophy of the ligamentum flavum, sclerotic protrusion of the intervertebral disc, high collapse of the intervertebral disc and other reasons resulting in narrowing of the intervertebral foramen of the spinal nerve root pathway, mechanical jamming of the nerve root or secretion of inflammatory mediators to produce inflammatory damage to the nerve root, resulting in recurrent episodes of low back pain or low back and leg pain for a long time. The detailed explanation is as follows: 1.Severe symptoms of lumbar disc herniation, invalidated by strict conservative treatment or having caused acute neurological dysfunction, including herniated, ruptured, free discs of paracentral and lateral types, with the best indication for single-segment lateral type herniation. 2.Despite the effectiveness of conservative treatment, the symptoms recur quickly and repeatedly more than twice, the symptoms are severe during the attack, affecting work and life, and the medical history is more than six months; or although the symptoms and signs are not very serious, but the medical history is long, the diagnosis is clear, and the patient has a request for surgical treatment. 3, regardless of the length of history, once the nerve root paralysis damage, such as bunion dorsal extensor muscle strength of grade 4 or less. 4, Central type disc herniation combined with cauda equina damage, such as urinary and fecal dysfunction, CT shows no significant calcification of the intervertebral disc or posterior longitudinal ligament. 5.Despite the atypical history, symptoms and signs of disc herniation, CT, MRI and imaging examinations such as discography reveal a huge disc herniation. 6, herniated discs with combined lateral saphenous fossa or intervertebral foramen stenosis. 7, herniated disc with calcification of the protrusion. 8.Positive signs of nerve root compression, such as straight leg raise test, bunion extension and flexion test, weakened knee or Achilles tendon reflex, etc. 9, Imaging examination is consistent with clinical symptoms and signs. 10.Affected by systematic conservative treatment for 6-8 weeks. 11.Willing to undergo intervertebral foraminal surgery and assume the risk of puncture failure requiring conversion to open surgery.