TENS works by stimulating the nerves in your lower back — specifically the ones responsible for touch and pressure — which helps block out pain signals trying to reach your brain. It’s a bit like your nervous system can only handle so much at once… so when you’re feeling the pulsing of the TENS machine, the pain signals from your contractions have a harder time getting through.
Even better, the machine helps your body release endorphins — your natural feel-good hormones. These are like your body’s very own pain relief system, and TENS helps kick it into action.
And it’s not just about the physical benefits. Using a TENS machine can help you feel calmer, more focused, and more in control — which in turn supports your body's ability to labour efficiently. When fear and tension are reduced, it helps your oxytocin (the hormone that keeps labour going) do its job.