Radio frequency lesioning (denervation) is a procedure where nerves to facet joints (medial branch nerves) are destroyed. It’s used for localised spinal pain in the lumbar or cervical region, and is usually undertaken when medial branch blocks have proven to produce significant pain relief for a short duration. The purpose is to try and produce more prolonged pain relief, which can sometimes last up to a number of years. Radiofrequency therapy usually involves a heated probe, which is applied to disrupt the nerves, although sometimes other techniques are used. In addition, local anaesthetic and/or steroid is usually injected to reduce any post-procedural discomfort, and often several injections are undertaken during the same procedure.