Cancer pain in internal organs such as ascending colon, sigmoid colon, rectum, uterus, ovaries, and fallopian tubes can be relieved by radiofrequency electrical destruction of the lumbar sympathetic nerve. Lumbar sympathetic nerve disruption can also be used to relieve pelvic pain. Sympathetic nerve disruption technique was first proposed by Royle in 1924 to treat lower extremity spasms. Since then, DeBakey, Creech, Woodhall, and others have further refined the method for improving blood flow in patients with peripheral vascular disease. in 1970, Reid, WaTT, Gray, and others began using lumbar sympathetic nerve disruption to treat patients with pain. It has been used effectively to treat reflex sympathetic dystrophy, vascular obstructive disease, vasospastic disease, and various sympathetic pain syndromes. The operator should also be familiar with the anatomy of the sympathetic chain and other surrounding structures to avoid disruption of arteries, small veins, ureters and other lower abdominal organs and other complications. In the L1 and L2 planes, the genitofemoral nerve is in close proximity to the sympathetic chain, and its damage can produce severe postoperative pain problems. Therefore, either a trial block or radiofrequency thermal disruption of the lumbar region should be performed under x-ray guidance. Radiofrequency disruption should be performed only when a trial block with local anesthetics is performed and clinical effects are seen. Radiofrequency disruption of the lumbar sympathetic chain can be performed between the 2nd and lumbar vertebrae. If the RF disruption needle is correctly positioned, the pain will be rapidly reduced. Radiofrequency electrical disruption of the sympathetic nerve can permanently interfere with the sympathetic chain. The obvious advantage of this method over surgical sympathectomy is the low incidence of complications.