By 3pm I used to be reaching for the ibuprofen. I’ve had Arca for nine weeks and I haven’t touched the pill bottle once. That’s the part I didn’t expect.
The body that hurts by 4pm deserves better than ibuprofen.
A palm-sized TENS kit for chronic neck, back and muscle pain. Drug-free, wireless, dual-zone — and worn under your clothes.
Watch how Arca fits in.
Long workdays, training sessions, and the days your body just hurts.
“The wireless TENS device that actually works around your day.”




One device. Three ways to start.
The pads are consumables — most people swap them monthly. The refill plan keeps them coming automatically.

Everything you need to get started. Pads last around a month of regular use.
- Arca dual-zone unit
- 2 adhesive pads
- USB-C cable + canvas pouch

The device with three months of pads and the printed routine guide.
- Arca dual-zone unit
- Three months of adhesive pads
- Printed 30-day routine guide
- Canvas storage pouch

Two fresh pads every month. Skip, pause or cancel anytime.
- 2 medical-grade adhesive pads
- Free UK shipping on every delivery
- Skip or pause anytime
£84 once, or £592 a year on what you're already buying.
For a UK adult treating chronic back or neck pain. Based on average usage and high-street pricing.
Bundle (£84) plus a year of pad refills (£36). Pays for itself in twelve weeks.
The honest comparison.
If one of the other options works for you, use it. Most people end up doing all of them — which is why we made Arca.
Figures based on Boots high-street pricing (Apr 2026) · CSP physio fee survey 2025 · NICE NG59 guidance.
What kind of pain do you have?
Pick the one that sounds most like you. We'll match you with the right modes, pad placement, and a routine built around your life.
The desk-day ache
Lower back and shoulders by 3pm. Sound familiar?
Route 02The runner's recovery
DOMS, IT-band, tight calves after long runs.
Route 03Postnatal back pain
Lower back relief that's safe to use while feeding.
Route 04Sciatica and nerve pain
Down-the-leg pain, glutes, lower back flare-ups.
Route 05Long-haul travel
Stiff neck and lower back after flights or long drives.
Route 06General body fatigue
Not sure where it hurts — it just does. Most days.
The science behind Arca isn't ours. It's been studied since 1985.
TENS is one of the most-researched non-drug pain treatments in the world. Here's the headline number, then three supporting studies.
Average reduction in chronic low-back pain intensity after 30 minutes of TENS.
A 2014 meta-analysis pooled 381 randomised controlled trials and found TENS produced clinically meaningful pain reduction across populations.
Vance, Dailey et al. · Pain Management · 2014
Daily 20-minute TENS sessions measurably improved how far participants could rotate their neck without pain or stiffness.
Johnson & Martinson · J. Pain Research · 2018
TENS applied after exercise reduced peak DOMS and shortened time to baseline strength versus rest alone.
DeSantana et al. · Sports Medicine · 2020
What people say
Early customer feedback. Filter by the pain context that sounds most like yours.
Three weeks in and I haven’t touched painkillers once. Wear it at my desk every morning. My neck and back feel looser than they have in years.
Six months of sciatic pain down my right leg. I’d tried everything. The first ten-minute session, I cried. Not because it hurt — because something finally helped.
I run 60km a week and my IT-band has been my whole personality for two years. Ten minutes on mode 4 after a long run is non-negotiable now. Sleep is better. Recovery is faster.
Wore it through three client meetings yesterday. Neck tension that used to hit by 2pm just… didn’t. Can’t believe it took me this long to try TENS.
Five months post-section and my lower back was wrecked. My GP suggested TENS. Arca was the only one that felt designed for an actual body, not a science experiment.
Neck and lower back both flare up together. Every other device made me choose. Arca doesn’t. Three months of daily use and still going strong.
I drive 40,000 miles a year for work. Lorry-driver shoulders. I keep Arca in the glovebox now. Twenty minutes at a service station and the rest of the day is bearable.
Tension headaches three times a week, mostly Zoom-related. I run Arca on the back of my neck during the meeting that’s causing it. Coworkers can’t see it. That’s the part that sold me.
Sciatica flare-ups used to mean a day on the sofa. Arca gets me functional through most of them now. Not a cure — but the best daily relief I’ve found.
£70 a session wasn’t sustainable. Arca keeps me functional between appointments. Upper back tension that built through the week now gets handled every evening.
Training for London 2026, peak weeks at 80km. Arca after long runs has replaced my whole ice-bath-and-ibuprofen routine. Feels almost too simple to be working this well.
My physio mentioned TENS. I bought a cheap one off Amazon first — it was unusable. Came back to Arca and it’s a different category of product. Calmer pulses, longer battery, better pads.
Wired devices are useless when you’re constantly shifting position. Arca stays on. Fifteen minutes and the edge comes off. Been using it six weeks straight.
I needed something I could use one-handed with a baby on me. The remote on the device makes it actually possible. Lower-back relief in ten minutes, no pills involved.
Two hours on the train used to lock up my lower back completely. Wear Arca on the commute now. Get off the train feeling normal. Genuinely consistent results.
Carry all my stress in my traps. Shoulders up around my ears by Thursday every week. Twenty minutes with Arca every evening and I’m a different person.
Wireless matters more than I expected. Arca just stays put however I move. Broad enough intensity range to find what actually works for my pain.
Run four times a week. Arca is now as much part of my recovery routine as stretching. Post-run lower back and hips recover noticeably faster.
Bought it for my neck tension. Sorted me within a week. Husband tried it for his back and now we’re fighting over it. Just ordered a second.
The sciatica was waking me up three times a night. After two weeks of using Arca before bed, I had a full eight hours. I cannot overstate what that did for me.
Lower back used to be destroyed after heavy sessions. Arca post-workout and next-day soreness is noticeably less. Wear it while cooking. Wireless makes that possible.
Two-hour Teams meetings used to leave me unable to stand up straight. Arca on the lower back for the back-to-back days. It’s become as essential as my coffee.
Physio cleared me to use TENS on surrounding muscles. Placed one pad on shoulder, one on upper back simultaneously. Recovery noticeably faster than expected.
Sciatica and two-hour drives were a nightmare. Put Arca on before I get in the car now. Arrive at the other end feeling normal. Partner thinks I’m obsessed.
IT band tightness was affecting my running. Arca on the outer quad and lower back post-run. Tightness reduced significantly over a month. Replaced most of my recovery kit.
Plasterer for 18 years. Constant ache between the shoulder blades. Arca on mode 3 for fifteen minutes at the end of every day is the most consistent thing that’s ever helped.
After heavy WODs my back and shoulders are done. Arca goes on while I cook dinner. By morning I feel significantly less wrecked. 10-hour battery is genuinely useful.
HGV driver. Left shoulder wrecked by end of every shift. Wear Arca in the cab now. Arrive home in a completely different state. Wife noticed before I did.
Lower back DOMS after leg day was becoming a problem. Tried everything. Arca is the first thing that’s made a consistent difference. Two pads, twenty minutes, done.
Bad frozen shoulder days used to mean co-codamol. Arca takes the edge off enough to function. Doesn’t fix it — but manages it better than anything else I’ve tried.
Right shoulder and neck constantly tight from dual monitors. Two weeks of Arca at my desk and the chronic tightness reduced enough that I stopped noticing it.
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