Postherpetic neuralgia (PHN) is defined as persistent pain for more than 1 month after clinical cure of acute herpes zoster, and is one of the most persistent pain disorders in the middle-aged and elderly population, and is recognized as a world-class painful disease. The incidence of PHN is directly proportional to age, with a prevalence of 65%-74% in patients over 60 years of age. Patients suffer from severe pain for a long time, not only are they depressed, their survival and quality of life are severely reduced, medical costs increase significantly as they seek medical care, and their ability to work and socialize is reduced or even lost. Most patients with postherpetic neuralgia have severe pain, and the type of pain has the same characteristic clinical manifestations, and the pain is very severe and often unbearable. The main clinical manifestations of PHN are as follows: 1. spontaneous lightning-like, knife-like or tearing-like episodes of pain. 2. 2. Pinprick-like pain accompanied by persistent burning pain. 3. The frequency of spontaneous severe pain in most patients with postherpetic neuralgia is clinically manifested as intermittent episodes, but often lacks regularity and sometimes has no obvious relationship with body movement. Most patients have pain episodes <10< span=""> times/min, each lasting a few seconds to more than 10 seconds, and some patients with severe pain may have >10 times/min. 4. Unlike acute herpes zoster, patients with postherpetic neuralgia involve significantly increased psychological factors, and most have suicidal tendencies in the short term. For Mr. Jiang’s condition, we performed pulsed radiofrequency surgery on the innervated nerves in the focal area. The pain was relieved by 70% on the second day after the operation, and the pain in the left lower limb basically disappeared at the time of discharge three days later, and there was no numbness or motor impairment in the associated innervation area. The patient was very satisfied with the treatment result and said that the pain relief exceeded his expectation before the operation, and he did not expect to spend his lifetime in pain-free. Pulsed radiofrequency is a pulsed current emitted intermittently from the radiofrequency instrument to the nerve vertically in front of the needle tip. Compared with traditional RF methods, the main advantage of pulsed RF is the use of 20 ms pulse width pulsed current, controlled voltage <40v< span="">, controllable temperature <42℃, and research data shows that the temperature <45℃ or less will not damage nerve fibers, so there is no nerve root damage possible, and postoperative sensory loss, soreness, burning pain and motor nerve damage will not occur. The advantages of pulsed radiofrequency treatment are: percutaneous puncture operation, which is less dangerous and can be used even for outpatients; accurate nerve localization under electrical stimulation and resistance monitoring; no destruction of nerves, no skin numbness, foreign sensation and other complications; low incidence of neuritis after treatment; repeatable treatment when needed without increasing the difficulty of operation. Currently, it is widely used in the treatment of chronic pain in clinical practice. Indications include localized intractable somatic pain, neuropathic pain, cervicogenic headache, lumbar spinal stenosis and post-operative lumbar spine pain syndrome, etc.