Radiofrequency neurotomy uses heat generated by radio waves to target specific nerves and temporarily turn off their ability to send pain signals. Needles inserted through your skin near the painful area deliver the radio waves to the targeted nerves. Your doctor will use imaging scans during radiofrequency neurotomy to make sure the needles are positioned properly. Radiofrequency neurotomy is most commonly used for pain in the back, neck and buttocks (sacroiliac joint). It may also be helpful for long-term knee or hip joint pain.