Short answer: Voltarol is diclofenac, a non-steroidal anti-inflammatory. It works by reducing inflammation in joints and muscles. Nerve pain is not an inflammation problem: it is a signalling problem, where the nerve itself fires when it should be quiet. Voltarol is designed and licensed for that job, not for this one, which is why many people find it helps a sprained ankle but makes little difference to burning feet, sciatica or diabetic neuropathy.
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The NHS makes the same point: standard painkillers often do not work for nerve pain.
This is not a criticism of the product. It is a mismatch between what it does and what people are buying it for.
What Voltarol is actually for
Voltarol gel contains diclofenac, an NSAID. Its licensed uses in the UK are musculoskeletal: strains, sprains, sports injuries, and the pain and swelling of joint conditions such as knee osteoarthritis.
It works by blocking COX enzymes, which reduces the production of prostaglandins, the chemicals that drive swelling, heat and inflammatory pain. Applied over a swollen joint or a strained muscle it does exactly that, locally, with far less systemic exposure than swallowing a tablet.
Nowhere in that mechanism is there anything that acts on a nerve.
Why nerve pain is a different problem
Ask someone with an inflamed joint what it feels like and you will hear: aching, throbbing, stiff, swollen, worse after use.
Ask someone with nerve pain and you get a completely different vocabulary: burning, electric, shooting, tingling, pins and needles, like walking on gravel, like being plugged into the mains. Often worst at night, when nothing is being used at all.
That second list is not describing inflammation. It is describing a nerve firing without cause. The nerve holds an electrical charge across its membrane and needs minerals, magnesium in particular, to keep the calcium gates on that membrane from opening too easily. When it runs short, those gates get twitchy and the nerve sends pain signals with no injury behind them.
Blocking prostaglandins does not quiet a twitchy nerve membrane. There is simply no route from one to the other. That is the whole answer.
Matching the product to the problem
| What you have | Feels like | What it responds to |
|---|---|---|
| Sprain, strain, sports injury | Sore, swollen, tender to press, worse with use | NSAID gel such as Voltarol or ibuprofen gel. The right tool |
| Osteoarthritic joint | Deep ache, stiffness, grinding | NSAID gel plus movement. Reasonable |
| Sciatica / trapped nerve | Shooting pain down the leg, tingling, worse sitting | Not an NSAID target. Needs the nerve calmed and pressure relieved, see what actually helps a trapped nerve |
| Peripheral neuropathy / burning feet | Burning, numbness, pins and needles, worst at night | Not an NSAID target at all, see why feet burn at night |
What about Deep Heat, Tiger Balm and the menthol rubs?
Different mechanism, different purpose.
Menthol and camphor are counter-irritants. They trigger cold or heat receptors in the skin so your brain has something else to pay attention to. It is a genuine effect, and as a layer of immediate comfort it has its place. The problem is when the sensation is the entire product: it sits on the surface, it fades within the hour, and the nerve underneath is completely unchanged.
If a product's entire selling point is how strongly you feel it in the first thirty seconds, that tells you where it is working: on your skin.
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Why people keep buying it anyway
Three reasons, and none of them are stupid:
- It is the default. Voltarol is the most visible pain gel in every UK pharmacy. When your leg hurts you reach for the pain gel.
- "Pain relief" is one aisle. Nothing on the shelf distinguishes inflammatory pain from nerve pain, so nobody knows to ask.
- It half-works at first. With sciatica there is often real muscle guarding around the spine alongside the nerve pain. An NSAID gel can take the edge off that muscular layer, which can feel like progress, while the shooting pain has a different source.
A different approach some people prefer
If the pain is burning, electric, tingling or shooting, you want something aimed at the nerve rather than at inflammation.
Topical magnesium is one approach some people prefer, with one important caveat: magnesium chloride on its own barely penetrates skin. Most magnesium sprays sting, leave a chalky film and deliver very little. What changes that is a carrier, MSM crosses the skin barrier easily and takes the magnesium with it. We cover how to pick a product that actually delivers in Magnesium cream for nerve pain: does it actually work?
NuraCalm Total Relief is built on that pairing: magnesium chloride carried by MSM, with arnica and vitamin B6, plus a light touch of menthol for cooling comfort while the magnesium works, the sensation is the welcome mat, not the whole house. No capsaicin, and a 90-day money-back guarantee, because working on a nerve takes weeks rather than minutes.
Frequently asked questions
Does Voltarol work for sciatica?
Only indirectly and partially. It can ease muscle guarding around the lower back, but it does not act on the compressed nerve root that causes the shooting pain down the leg.
Does Voltarol work for neuropathy or burning feet?
It is not designed or licensed for it. Peripheral neuropathy is nerve damage and misfiring, with no inflammatory component for an NSAID to act on.
Is ibuprofen gel any different from Voltarol?
Not in a way that matters here. Both are topical NSAIDs working through the same anti-inflammatory pathway, so both have the same mismatch with nerve pain.
What is the difference between nerve pain and inflammatory pain?
Inflammatory pain comes from tissue damage and swelling, aching, throbbing, worse with use. Nerve pain comes from the nerve itself misfiring, burning, electric, tingling, often worst when you are still. They need different treatments.
When should I use Voltarol?
For sprains, strains, sports injuries and painful arthritic joints it is a sensible choice. Follow the label, do not use it on broken skin, and check with a pharmacist if you take blood thinners, have asthma, or have a history of stomach ulcers.
Sources
This article is for general information and is not medical advice. Voltarol is a registered trade mark of its respective owner; we are not affiliated with it. Always read the label and speak to your GP or pharmacist about persistent pain. Speak to your GP or pharmacist before changing or stopping any medication.
See how NuraCalm Total Relief works →
Looking for a simple daily comfort routine? See why thousands in the UK keep NuraCalm Total Relief on their bedside table
- Magnesium chloride with MSM and arnica, made for daily use
- A light touch of menthol for an immediate cooling comfort
- From £27.90, with a 90 day money back guarantee