The mechanism of plasma ablation coagulation for cervical and lumbar disc herniation: the use of cold ablation cutting technique and thermal coagulation technique reduces the volume of the nucleus pulposus tissue, decreases the pressure of the intervertebral disc, and relieves the nerve compression to achieve the treatment purpose. The cold ablation technique (40℃) The 1mm diameter ablation needle is punctured into the center of the nucleus pulposus, and firstly, the ablation mode is used to apply 100Hz radiofrequency energy to the vaporizing electrode, and the surrounding Na+ aggregates (plasma) and moves to impact and break the molecular chain of the nucleus pulposus tissue, which decomposes the elemental molecules and low molecular gases (O2,H2,CO2) and reduces the nucleus pulposus tissue. The ablation needle adopts the thermal coagulation mode to act on the nucleus pulposus tissue, which will vaporize, contract and solidify the collagen fibers and reduce the nucleus pulposus.