Radiofrequency ablation (RFA) is a medical procedure in which part of the electrical conduction system of the nervous system or other dysfunctional tissue is ablated using the heat generated from medium frequency alternating current. RFA is generally conducted in the outpatient setting, using either local anesthetics or conscious sedation anesthesia. You can continue your regular diet and medications immediately, but do not drive or do any rigorous activity for 24 hours after the procedure. Take it easy. You can return to your normal activities the next day. 50% of patients undergoing this procedure for low back pain will experience significant pain relief for as much as two years.