Radiofrequency ablation is heat aimed precisely at the small nerves that carry pain from a spinal joint. It is the longest-lasting of the injection-based treatments.
What is radiofrequency ablation?
The medial branch nerves give feeling to the facet joints (the small joints at the back of the spine). They do almost nothing else. If blocks have proven those joints are your pain source, a radiofrequency probe can heat and interrupt those nerves. The joint is left alone. Only its pain supply is treated.
What does radiofrequency ablation treat?
- Confirmed facet joint pain in the neck or low back
- Whiplash that has not settled and where blocks confirm the facet joints are involved
- Sacroiliac joint pain in chosen cases
What should I expect from radiofrequency ablation?
- Two prior medial branch blocks must have given clear short-term relief.
- The procedure takes longer than a plain injection, usually 30 to 45 minutes.
- Position is checked by X-ray and by test stimulation before any heat is used.
- Expect a sore back or neck for one to two weeks afterward; this is normal and settles.
- Relief usually starts at two to three weeks, not right away.
What are the risks of radiofrequency ablation?
Expect the treated area to be sore for one to two weeks — this is the most common complaint and it is a normal consequence of a thermal lesion rather than a complication. A patch of numb skin above the treated joints is possible and usually settles. A small share of patients get neuritis, a burning discomfort that lasts several weeks. Motor nerves (the ones that move muscles) are not the target. They are checked by test stimulation before any heat is used. The procedure is not repeated close together because the nerves must grow back first.
To talk about whether this is right for you, call us or request an appointment.
How do you know if radiofrequency ablation worked?
The timeline trips up people who are not warned. There is no instant relief. There is soreness after the procedure, and the relief starts at two to three weeks. Patients expecting an injection-like quick result decide it has failed just when it is starting to work.
Success is measured over months. Six to twelve months of real relief is the usual result. Because the nerves regrow, it is a treatment you can repeat, not a one-time cure.
Before and after your procedure
No sedation is used, so most patients drive themselves home. Plan for the treated area to be sore for one to two weeks — this is expected, not a complication, and it is worth not scheduling anything physically demanding in that window. Ice helps in the first few days. Do not judge the result before three weeks. The relief starts as the treated nerves stop sending signals, not on the day. Call for fever, spreading redness, or new weakness.
Common questions
How long does relief last?
Often six to twelve months, sometimes longer. The nerves grow back, and the procedure can be repeated.
Sacroiliac Joint Radiofrequency Ablation covers the same treatment for the sacroiliac joint.
Will it weaken my back?
The medial branch nerves carry feeling from the joint. Muscle function is not the target. It is checked by stimulation before ablation.
Why the wait before it works?
The heated nerve takes a couple of weeks to stop sending signals. The treated tissue is sore in the meantime.
Medial Branch Block covers the test that has to come first.
Why am I in so much pain after radiofrequency ablation?
Soreness after radiofrequency ablation is expected. The heat makes a small thermal lesion (a tiny heat-treated spot), and the treated area is usually sore for one to two weeks. That is the most common complaint. It is a normal result of the treatment, not a complication. A small share of patients get neuritis, a burning discomfort that lasts several weeks. Call us for fever, spreading redness or new weakness.
How long does it take to recover from radiofrequency ablation?
Plan on one to two weeks of soreness in the treated area, and avoid scheduling anything physically demanding in that window. Ice helps in the first few days. Relief does not come on the day of the procedure. It usually starts at two to three weeks, as the treated nerves stop sending signals. Do not judge the result before three weeks.
What should you not do after radiofrequency ablation for back pain?
No sedation is used, so most patients drive themselves home. Do not plan anything physically demanding for the one to two weeks the treated area is sore. Do not decide the treatment has failed before three weeks, because the benefit starts at two to three weeks, not on the day. And do not wait on fever, spreading redness or new weakness: call us.
Do you need bed rest after radiofrequency ablation?
Bed rest works against it. The heat is aimed at small sensory nerves; no bone, disc or joint is cut, so normal activity, including work, resumes within two to four hours and walking is encouraged from the first day. Keep heavy exertion out of the sore week or two, but days in bed stiffen the joints and decondition the back muscles the relief is supposed to let you rebuild. Use the quiet months for physical therapy, which is done in this office, not sent out.
What is the difference between a nerve block and radiofrequency ablation?
A block asks the question and the ablation acts on the answer. A diagnostic nerve block puts a small dose of numbing medicine on the nerve and wears off within hours; if your pain disappears for that window, that nerve is proven to carry it. Radiofrequency ablation then heats the same nerve so it stops signaling for months, not hours. Ablating without the block first means treating a nerve on a guess.
Sources
- Leggett LE et al. Radiofrequency ablation for chronic low back pain: a systematic review of randomized controlled trials. Pain research & management, 2014. PubMed 25068973
- Du R et al. Percutaneous radiofrequency ablation and endoscopic neurotomy for lumbar facet joint syndrome: are they good enough?. European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2024. PubMed 38141106
- Tieppo Francio V et al. Multifidus atrophy and/or dysfunction following lumbar radiofrequency ablation: A systematic review. PM & R : the journal of injury, function, and rehabilitation, 2024. PubMed 38757474
- Cohen SP et al. Consensus practice guidelines on interventions for lumbar facet joint pain from a multispecialty, international working group. Regional anesthesia and pain medicine, 2020. PubMed 32245841
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