With the progress of medicine, radiofrequency thermal coagulation technology for the treatment of painful diseases has been rapidly developed in foreign medical circles, and many pains that cannot be controlled by traditional treatment methods are often perfectly solved by radiofrequency thermal coagulation technology. The principle of radiofrequency thermal coagulation technology for the treatment of pain is through the radiofrequency instrument to send out high frequency radioelectric current, so that the target tissue ion movement frictional heat, thermal coagulation destruction of the target area tissue, nerve. Highly selective destruction of nerve fiber conduction branch, blocking the pain signal to the superior nerve conduction, destroying the pain conduction pathway, so that it can not be transmitted to the brain, can not produce pain sensation and experience, so as to achieve the purpose of pain control. The nerve fibers managing nociceptive conduction in human body are unmyelinated fine fibers (Aδ, C) with a fine diameter (2~4μm), which usually degenerate at 70℃~75℃, while the nerve fibers managing motor and tactile conduction are myelinated thick fibers (Aβ) with a thicker diameter (8~14μm), which can tolerate higher temperature. The radiofrequency thermal coagulation technique is a clever way to take advantage of the difference in temperature tolerance of different nerve fibers and selectively block the Aδ and C fibers that conduct nociception to achieve both pain relief and preservation of local tactile sensation. Clinical treatment scope of radiofrequency thermal coagulation destruction therapy: 1, chronic, intractable and difficult pain 2, spinal radicular pain (radicular compression pain, small joint disorders) 3, neurogenic pain (trigeminal neuralgia, postherpetic pain, stellate ganglion migraine, sympathetic nerve disorders) 4, advanced cancer pain (to improve the quality of life of patients) 5, with the image, stereotactic head frame, microelectrodes and computer operation Software can do intracranial destruction (neurosurgery, brain surgery) 6, with professional intervertebral disc destruction electrode can do intravertebral disc thermal coagulation destruction 7, pulse destruction system: choose 42 ℃ reversible destruction temperature can achieve minimal trauma and minimal neuroinflammatory response RF treatment technology has the characteristics of minimally invasive, rapid analgesia, etc., and the incidence of complications and side effects is very low under the correct operation. With the help of the electrical stimulation test and impedance monitoring system equipped in the radiofrequency instrument itself, the technology can accurately place the radiofrequency needle to the relevant nerve site. By adjusting the size of radiofrequency output power and setting the action temperature, the scope of the damage foci can be precisely controlled to avoid unnecessary side damage.