The one TENS setting that actually works.
TENS devices for period pain are everywhere, and most of them work — technically. The catch is a single dial that decides whether you bought relief or a placebo, and most boxes won't tell you where it's set.
What TENS is doing
TENS — transcutaneous electrical nerve stimulation — sends a gentle current through pads on your skin. The idea is old and well-understood: a steady stream of harmless sensory signals crowds the nerve "traffic," so fewer pain messages get through to the brain. You feel a light buzzing where it aches, and the cramp fades into the background.
High-frequency vs low-frequency: it's not a detail
There are two ways to run it, and they are not interchangeable. The Cochrane review of TENS for period pain found that high-frequency stimulation — around 80–100 Hz — beat placebo with an odds ratio of 7.2. That's a big, clear effect. Low-frequency TENS, in the same body of evidence, did no better than a sham device.
Proctor et al., Cochrane Database of Systematic Reviews, 2002 / 2009
So the whole question of whether a TENS device helps your period pain comes down to one number. And here's the uncomfortable part: a lot of cheap devices either run at the lower setting or simply never say. "3 modes, 20 intensities" tells you nothing if none of the modes is the one the trials used.
Why we'll print the number on the box
When Relief · Pulse arrives, it will run high-frequency — in the 80–100 Hz band the evidence points to — and we'll say so plainly, on the box, not buried in a spec sheet. It'll have fine intensity control instead of three big jumps, so you can settle on the exact level that feels like relief rather than a shock. And it'll work without an app or an account, because turning off your pain shouldn't require a login.
Used with care: TENS is drug-free and gentle, but it isn't for everyone. It isn't suitable if you have a pacemaker or another implanted electrical device, if you're pregnant, or if you have epilepsy, and it should never go over broken or numb skin or near the heart or throat. If you're unsure, ask your doctor first.
← More reading