Minimally invasive spinal endoscopic techniques are safe, reliable, fast recovery, low cost, and have many advantages, and are currently the preferred method of spinal surgery; 3, wound infection, skin margin necrosis, osteomyelitis, intracanalicular infection, intervertebral space infection, abscess formation; 4, postoperative symptom relief is not obvious, or symptoms aggravated, turn to open surgery; 5, instrumentation breakage is inevitable, only a matter of time, instrumentation breakage requires microscopic, or even open surgery to remove, or can not be removed; 6, due to anatomical variation, individual differences, nerve root variation, puncture failure need to change the operation or 7.Intraoperative radiofrequency ablation equipment is needed, and radiofrequency ablation knife is a disposable consumable, costing 13,500 yuan, which is a self-financed item and cannot be included in the scope of medical insurance reimbursement. 8.According to the intraoperative bleeding situation, special hemostatic or anti-adhesion materials may be used, some of which are medical insurance category C and cannot be reimbursed. 9.For patients with multi-segment lumbar spinal stenosis or disc herniation, it is necessary to select one decompression according to the responsible stage. If the symptoms remain after surgery, it is necessary to carry out the procedure in several times, resulting in longer hospitalization or re-hospitalization and increased costs. 10.Postoperative recurrence of disc herniation or protrusion of discs in adjacent segments, or contralateral lower limb pain and spinal stenosis require further treatment; 11.Severe disc degeneration, disc fragmentation, and re-protrusion in elderly patients after partial removal of prolapse may still require reoperation; 12.Insufficient postoperative protection is likely to lead to recurrence of pain, requiring reoperation; 13.Surgery for spinal stenosis is very difficult and was previously a spinal endoscopic Surgery is contraindicated, and some patients have poor surgical results or require reoperation or open surgery; 14, postoperative functional recovery is determined by the degree of nerve compression, and surgery is only to reduce the compression; 15, the basic factors of disc herniation are congenital development and degeneration, and the promoting factor is strain. Controllable factors are strain, can only slow down the development, but sometimes it is also uncontrollable, so the disc herniation is also inevitable, only a matter of time; 16, need to buy medical insurance 17, other unpredictable accidents, complications.