I. Pre-operative diagnosis Take medical history: time of herpes, current scope and nature of pain, duration and intensity of pain. Ask whether the pain medication is used and the name and dose of the medication, and draw the pain range on the body surface, past medical history, VAS score. Preoperative preparation 1. Improve the auxiliary tests: blood and urine routine, coagulation routine, blood sugar, liver and kidney function, hepatitis B and half, HIV antibody, electrocardiogram 2. 3. Prepare the skin in the evening before the operation, give painkillers such as Prevacid 100mg Bid orally before the operation, and give oral antibiotics to prevent infection half an hour before the operation. The patient was placed in lateral position with the affected side on top, the segment of nerve destruction was determined according to the plane, the vein was opened, the cardiac monitoring was connected, and after routine disinfection and towel laying, the intervertebral foramen was punctured under local anesthesia with a 2.5 cm opening next to the highest point of the corresponding spinous process, the puncture had a clear sense of breakthrough, there was no blood and cerebrospinal fluid in the retraction, there was no resistance to air injection, the tip of the needle was determined to be located in the intervertebral foramen under the C-arm, the receiver was taken over, and from each tube was injected Then inject 40mg of methylprednisolone or 1ml of Depo-Provera (also can be used according to the patient’s condition), pull out the needle, put a band-aid on the eye of the needle, ask the eye of the needle not to get wet within two days, send the patient back to the ward, ask him to keep this position for 6-8 hours, and be absolutely bedridden within 24 hours. IV. Postoperative treatment 1. Give anti-inflammatory treatment for two days, nerve nutrition and nerve dehydration for 7 days. 2. Observe the change of condition, measure the VAS score daily and check whether there is any change in the pain range, and consolidate the treatment once in the outpatient clinic after seven days.