The mechanism of radiofrequency thermocoagulation for lumbar disc herniation Radiofrequency thermocoagulation for lumbar disc herniation is to directly denature, coagulate, shrink, reduce the volume of the protruding and pathogenic part of the nucleus pulposus, relieve the compression, and seldom injure normal nucleus pulposus tissues; the warmth and heat effect produced by the electrode can play a good therapeutic role in the damage of the annulus fibrosus, the edema of the nerve root, and inflammation of the peripheral nerve root, and the symptoms can disappear and be alleviated immediately after treatment, and the efficiency is very high. The symptoms can disappear and reduce immediately after the treatment, and the efficiency is very high. During the operation, only local anesthetic is needed, no hormone is needed, and antibiotics are used for 1~2 days to prevent infection, which makes the treatment “green and safe”. Safety guarantee measures for radiofrequency thermo-coagulation treatment of lumbar disc herniation (1) CT-guided accurate localization. (2) Precise identification and stimulation of nerves. (3) Impedance measurement display function. (4) Controllability of temperature. (5) During the treatment, based on the size of the herniated disc determined before the operation, the direction of the electrode can be adjusted several times during the operation for multiple treatments to ensure the efficacy after the operation. (6) The diameter of the guide needle used for puncture is 0.7MM, which is very safe as the patient is awake during the puncture with minimal pain and trauma, and the operation is performed under local anesthesia. (7) The temperature of the tip of the electrode is around 85-90℃, which seldom causes bleeding in the operation area and the infection rate is very low.