If you have spent time at an interventional pain clinic, you may have heard the phrase “burning the nerve.” It sounds alarming, and it is a little misleading. The procedure behind it, radiofrequency ablation (RFA), is one of the most common treatments for long-running back and neck pain, and it helps a specific group of people well and others hardly at all.
This guide explains what RFA actually does, who tends to be a good candidate, why you are tested before anyone ablates anything, and what the evidence says about how well and how long it works.
What radiofrequency ablation treats
Your spine is a stack of bones joined at the back by small paired joints called facet joints. Like knees and hips, they can wear down with age or injury, and when they do they can hurt. Facet pain is usually a deep, aching pain in the low back or neck, often worse when you lean back, twist, or stand for a long time. It may spread into the buttock or shoulder, but it does not usually run down a leg or arm in a narrow line.
Each facet joint reports pain through tiny nerves called medial branches. RFA uses a thin needle-like probe and radio waves to heat a short section of those nerves, so they stop carrying pain signals from the joint. It does not fix the joint. It interrupts the message.
That distinction matters. RFA is not a treatment for sciatica, the shooting leg pain caused by an irritated nerve root. That is a different problem, and it is more often treated with an epidural injection, which we covered in what the evidence says about epidural steroid injections. The same technique is also used around the knee and the sacroiliac joint, but spinal facet joints are its most common target.
Why you are tested first
Imaging cannot reliably show whether a facet joint is the source of your pain. Plenty of people have worn facet joints on an MRI and no pain at all. So before RFA, most clinics perform diagnostic blocks: an injection of numbing medicine onto the same medial branch nerves.
The logic is simple. If numbing those nerves makes your usual pain fade for a few hours, they are probably the ones carrying it, and RFA has something to aim at. If the block does nothing, ablating those nerves is unlikely to help either.
Many insurers, including Medicare, generally require two separate diagnostic blocks, each giving substantial short-term relief, before they will cover the ablation. That can feel like red tape, but it prevents ablations in people whose pain never came from those joints. Log your pain in the hours after each block, because the clinician will ask.
What the procedure day looks like
RFA is done as an outpatient procedure, usually in a clinic procedure room or surgery center. You lie face down for the low back, or face down or on your side for the neck. The skin is numbed, and some patients also receive light sedation. Using live X-ray guidance (fluoroscopy), the physician places a probe next to each target nerve, often tests it with a small electrical signal to confirm the position, then numbs the area and heats the nerve for a minute or two.
Plan on a few hours at the clinic and a driver home. Soreness at the treatment site for a week or two is common, and the full benefit may take two to three weeks to show. Some clinics use variations, such as cooled or pulsed radiofrequency. Ask which one is planned and why.
How well it works, and for how long
The honest answer is that results vary, and the research is mixed.
For neck pain from facet joints, a small placebo-controlled trial published in the 1990s found meaningful relief in people who had first been confirmed with diagnostic blocks, and it remains one of the more persuasive studies in the field. For low back pain the picture is less clear. A large set of Dutch trials published in 2017 found that adding RFA to an exercise program did not produce a clinically important extra benefit on average. Critics noted that those trials used only a single diagnostic block to select patients, which may have let in many people whose pain was not facet-related.
What most pain physicians would agree on:
- RFA works best when patient selection is careful and the blocks clearly helped.
- When it works, relief commonly lasts somewhere around six months to a year, sometimes longer.
- The nerves usually grow back, so pain can return. The procedure can often be repeated if it helped the first time.
- It works best as part of a plan that includes exercise or physical therapy, not as a stand-alone fix. Our overview of pain management without opioids covers how these pieces fit together.
Risks to discuss
Serious complications are uncommon, but you should hear about them in plain words. Typical short-term effects include soreness, bruising, and a patch of numbness or sensitive skin. Less often, people have a burning, sunburn-like pain for a few weeks as the nerve settles. Infection and bleeding are rare. Tell the clinician about blood thinners, diabetes, a pacemaker or implanted defibrillator, and any possibility of pregnancy. Do not stop a medication on your own.
Before you agree, work through our questions to ask before any pain procedure, especially how success will be measured.
Who is usually a good candidate
RFA is most often considered for people who:
- Have had back or neck pain for at least a few months, usually three or more.
- Have pain that fits a facet pattern, not a shooting nerve pain down a limb.
- Have tried conservative care, such as physical therapy and medication, without enough relief.
- Got clear, short-term relief from diagnostic blocks.
It is usually not the right first step for new pain, for pain mainly running down a leg or arm, or for widespread pain with no single source.
Finding a clinic that does RFA
RFA is performed by interventional pain physicians, often trained first in anesthesiology or physical medicine and rehabilitation. Our directory of pain clinics ranks practices on signals explained in our methodology: whether a practice is registered under the federal interventional pain medicine taxonomy, patient ratings and review volume, years in practice, and whether it lists a working website and phone number. Clinics cannot pay for a higher position. The ranking does not yet track which procedures a practice performs, so call and ask directly whether they offer diagnostic medial branch blocks and RFA, and how often they do them.
This article is educational and is not medical advice. Whether radiofrequency ablation is appropriate for you depends on your diagnosis, your history, and your examination, and should be decided with a licensed clinician who has examined you.
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