Radiofrequency lesioning has been used since the 1950s, initially using continuous radiofrequency in the 1 megahertz range. Radiofrequency lesioning is generated by a radiofrequency generator, which is connected to the electrode placed in the body. This procedure is for the treatment of low-back pain originating from lumbar facet joint etiology. The rationale is based on performing diagnostic controlled blocks of medial branches that innervate the symptomatic joint, and the patient obtaining significant relief of back pain, up to 80%. Usually two sets of diagnostic injections are done. The medial branches of the cervical dorsal rami course along the anterolateral and posterolateral aspect of the articular pillars. There is slight variation in the course of the medial branches depending on the level.