A facet rhizotomy is a procedure which can alleviate back pain in people. It involves injecting a needle into the back and heating up nerves to deaden them. The procedure begins with an IV anesthetic to keep you comfortable. There also a local anesthetic used in the treatment area. Doctors use real time x-ray to find the exact location of the nerves to be treated. Afterwards you can expect soreness that will improve in days and coming weeks. A rhizotomy can vastly improve a debilitating back injury.