Radiofrequency Ablation for Back Pain: How It Works and How Long It Lasts

If injections have helped your back or neck pain but the relief keeps wearing off, your physician may bring up radiofrequency ablation – often shortened to RFA. It is a well-established, minimally invasive way to quiet the specific nerves carrying your pain, and for the right patient the relief lasts far longer than a typical injection. Here is how it works, who it helps, and what to expect.

What is radiofrequency ablation?

Radiofrequency ablation “uses radio waves to create a current that heats a small area of nerve tissue,” and “the heat destroys that area of the nerve, stopping it from sending pain signals to your brain” (Cleveland Clinic). In plain terms, it does not fix the joint – it turns down the volume on the specific nerves that are reporting the pain, so you feel less of it.

What does RFA treat?

RFA is used for chronic pain “caused by conditions including arthritis of the spine (spondylosis) and sacroiliac (SI) joint pain,” as well as “pain in your neck, back and knee” (Cleveland Clinic). For spine pain it targets “the medial branch nerve in the facet joints or the lateral branch nerve in the sacroiliac joints” – the small nerves that carry pain from those joints.

Why a diagnostic block usually comes first

RFA is not the first step – it is a targeted step you earn with a test. A diagnostic block “consists of an injection of a local anesthetic near the area of pain,” and if that test provides relief, “your provider may recommend RFA as a treatment to ease your pain” (Cleveland Clinic). That block is how your physician confirms the right nerves are causing your pain before treating them, which is why patients often have a medial branch block before RFA is scheduled.

How the procedure works

RFA is an outpatient procedure done with image guidance. Your physician uses “fluoroscopy” – real-time X-ray – to guide “a thin needle” into the area, then checks placement by asking whether you feel “a tingling sensation (or discomfort or a muscle twitch)” before the heat is applied (Cleveland Clinic). The whole thing takes “from 15 minutes to two hours to complete,” depending on how many nerves are treated.

How painful is radiofrequency ablation?

Most people tolerate RFA well. You stay awake so you can answer your physician’s questions, and the skin is numbed first: “your doctor will use a local anesthetic to numb the area of your skin where a needle will be inserted” (Cleveland Clinic). During the procedure you might feel a tingling sensation, brief discomfort, or a muscle twitch as the needle reaches the right spot – that feeling actually helps confirm the correct nerve.

Afterward, it is normal to feel sore. Cleveland Clinic notes you “may still feel soreness, pain or muscle spasms at the treatment site for a few days,” and a mild burning sensation “may last for a week or two after the procedure” (Cleveland Clinic). If you would rather be relaxed during the procedure, a medication to help with that is optional and worth asking your physician about beforehand.

That early soreness can feel like your original pain for a little while before the relief sets in – and it doesn’t mean the treatment failed. Our guide to recovery and aftercare walks through what to expect day by day and when to call your care team.

Recovery and how long relief lasts

Recovery is quick. Most people “can return to your normal activities, including bathing or showering,” after “one or two days” (Cleveland Clinic). The relief tends to build over a couple of weeks as the treated nerves settle. As for how long it lasts: “pain relief can last from six months to 12 months,” and “for some people, the relief lasts a few years” (Cleveland Clinic). Nerves can slowly regrow – “if this happens, it usually happens about six to 12 months after the procedure” – and the good news is that “radiofrequency ablation can be repeated if needed.”

How Empire approaches radiofrequency ablation

At Empire Minimally Invasive Spine and Pain we use a step-and-ladder approach: we start with the least invasive option that can solve the problem and only move up if we need to. RFA sits a few rungs up that ladder – we generally reach it after conservative care and a targeted injection, and only once a diagnostic block has confirmed the right nerve is the source. Our procedures are image-guided for precise needle placement, and because we house interventional pain management and orthopedic care under one roof, you do not need a separate referral to move between them. We also treat facet- and SI-joint pain from work injuries and motor-vehicle accidents and can help coordinate workers’ compensation and no-fault documentation. You can read more on our radiofrequency ablation page, or learn how the diagnostic step works in our guide to facet joint injections and medial branch blocks.

Is radiofrequency ablation safe?

For most patients, yes. Cleveland Clinic notes that “the risk of complications from RFA is very low,” though “on occasion, permanent nerve damage or pain can occur,” and uncommon issues can include “infection and bleeding at the needle insertion site” (Cleveland Clinic). Your physician will review your specific risks and whether RFA is a good fit for you.

Is radiofrequency ablation worth it?

For the right patient, RFA is often worth it: when a joint in your spine is confirmed as the pain source, quieting the nerves that report that pain can give months of relief with a quick recovery. The key word is “confirmed.” RFA works best when a diagnostic block has already shown the targeted nerves are the ones driving your pain.

That is why the test comes first. Cleveland Clinic describes a diagnostic block as a way “to confirm the source and level of your pain, which can then predict the potential level of your pain relief”; a favorable response to that block is what points toward RFA (Cleveland Clinic). When the pain generator has not been confirmed that way, relief from RFA is less predictable – and that is the honest trade-off to weigh.

At Empire Minimally Invasive Spine and Pain, that diagnostic step is not something we skip. Because relief is real but temporary – the treated nerve can regrow – we set that expectation up front: RFA is a repeatable way to manage arthritic joint pain, not a one-time fix. For many people, that trade of temporary-but-repeatable relief with little downtime is a fair deal. Your physician can tell you whether your pain pattern and diagnostic results make you a good candidate.

Frequently asked questions

How long does radiofrequency ablation last?

Relief commonly lasts from six to 12 months, and for some people a few years. If the treated nerve regrows – usually about six to 12 months later – the procedure can be repeated (Cleveland Clinic).

Do I need a nerve block before RFA?

Usually. A diagnostic block with local anesthetic is used to confirm the right nerves are causing your pain; if it provides relief, your physician may recommend RFA (Cleveland Clinic).

What is recovery from RFA like?

It is quick – most people return to normal activities, including showering, after one or two days, with relief building over the following weeks (Cleveland Clinic).

Is radiofrequency ablation permanent?

No. The treated nerve can slowly regrow, usually six to 12 months later, which is why relief is measured in months to a few years and the procedure can be repeated if needed (Cleveland Clinic).

How painful is radiofrequency ablation?

The skin is numbed with local anesthetic and you stay awake during the procedure. You may feel brief tingling, discomfort, or a muscle twitch as the needle is positioned, and some soreness or muscle spasm at the site for a few days afterward (Cleveland Clinic).

Is radiofrequency ablation worth it?

It often is when a diagnostic block has confirmed the joint nerves are your pain source, since a good response to that block predicts better relief from RFA (Cleveland Clinic). Relief is temporary, but the procedure can be repeated.

Sources

• Cleveland Clinic – Radiofrequency Ablation