Radiofrequency neurotomy, also referred to as radiofrequency ablation, is a minimally invasive procedure that reduces facet or sacroiliac joint pain. This procedure may be performed if patients do not experience pain relief from a nerve or facet joint block. During radiofrequency neurotomy, small electrical currents are passed through a needle toward nerves surrounding facet or sacroiliac joint(s) causing pain. A heat lesion is then created by these electrical currents (radiofrequency waves) and applied to the affected nerves. This heat lesion effectively halts the nerve's ability to transport pain signals from the area causing pain to the patient's brain.