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Changing how a nerve sends its signals, rather than cutting or destroying it. For headache and nerve pain that medication has not controlled, it is often the next step — and it is reversible.
Pain is a signal. In long-standing pain that signal often keeps firing after the original injury has healed, or fires far more strongly than the problem warrants. Neuromodulation works on the signal itself: applying electrical pulses or medication to a specific nerve to change how it conducts, so less pain reaches the brain.
It does not repair the nerve, and it is not a cure for the underlying condition. What it offers is a way to turn the volume down when tablets have not, without destroying anything or committing you to surgery.
It is a step, not a last resort. Neuromodulation therapy is used alongside medication and physiotherapy, often to break a cycle of pain that is preventing everything else from working.
Three treatments are often grouped together, and they are not the same thing. The difference is what happens to the nerve.
| Nerve block | Pulsed radiofrequency | Radiofrequency ablation | |
|---|---|---|---|
| What is done | Local anaesthetic, often with a steroid, placed next to the nerve | Short bursts of energy that change how the nerve signals | Heat applied to a small nerve branch until it stops conducting |
| The nerve itself | Unchanged | Preserved | The treated branch is destroyed, and regrows over time |
| How long it lasts | Days to weeks | Weeks to months | Often several months to a year or more |
| Mainly used to | Confirm which nerve is responsible, and give short-term relief | Calm an irritated nerve without damaging it | Stop pain signals from a joint or small sensory branch |
A diagnostic block usually comes first. If numbing that nerve takes the pain away, treating it is likely to help; if it does not, the pain is coming from somewhere else, and that is worth knowing before going further.
Neuromodulation is a broad field, and a good deal of it belongs to hospital programmes rather than a clinic:
If one of those is the right treatment for you, the honest answer is a referral to a centre that runs the programme, not an approximation of it here.
Which nerve, and whether it explains your symptoms. Examination, your history, and imaging where it is needed.
Often the first treatment: numbing the suspected nerve to see what the pain does. The answer guides everything after it.
A day procedure, with local anaesthetic and light sedation where appropriate. Spinal treatments are done with CT or X-ray guidance, with radiologists, so the needle goes exactly where it is meant to. Most people go home the same day.
Soreness at the site for a day or two. Relief from a block can be immediate; pulsed radiofrequency often takes a few weeks to show its full effect. Normal activities usually resume the next day.
What changed, by how much, and for how long. Treatments that help can be repeated; treatments that do not are not repeated for the sake of it.
Response varies. Some people get months of substantial relief, some get partial relief that makes other treatment work better, and some get little. Because the effect is temporary and the nerve is preserved, a treatment that does not work is not a decision you have to live with.
Dr Mathew Tung, neurosurgeon. Migraine is managed with neuromodulation alongside preventive treatment, with the aim of fewer and less severe attacks rather than only treating them once they start.
Pulsed radiofrequency, occipital nerve treatments, sphenopalatine blocks with radiofrequency and cervical epidural injections are part of that practice.
Dr Lim Heng Hing, orthopaedic spine surgeon and a Fellow of Interventional Pain Practice, offers radiofrequency ablation and intradiscal therapy for chronic back and neck pain.
Dr Tung also works with radiologists on CT-guided nerve root and facet blocks and radiofrequency nerve ablation for spinal pain.
No. Blocks last days to weeks, pulsed radiofrequency weeks to months, and ablation often several months to a year or more before the small nerve branch regrows. Treatments that work can be repeated.
There is a sting from the local anaesthetic, and pressure during the procedure. Sedation is used where appropriate. Most people describe soreness rather than pain afterwards.
Relief from a block is usually immediate, though it may be short-lived. Pulsed radiofrequency often takes two to six weeks to show its full effect, so it is judged at a review rather than the next day.
No. Implanted spinal cord stimulators and deep brain stimulation are hospital programmes. If that is what you need, we will say so and point you to the right centre.
Yes, and usually you should. Neuromodulation is used alongside medication, and any changes are made deliberately rather than all at once.
No. Bring a list of the medications you have tried, any scan reports, and notes of any injections or nerve treatments you have already had.
Neuropathic pain · Headaches · Migraine · Trigeminal neuralgia · Post-herpetic neuralgia · Back pain
Bring the list of what you have already tried. Neuromodulation is chosen against that history, not in place of it.
