“TENS” is an acronym for Transcutaneous Electrical Nerve Stimulation. This unit works two ways. One, it interrupts the pain signal going to the brain from the effected area. Two, it also increases endorphins (the body’s natural pain killer). According to Rugers.

Supposed to interrupt the pain signal.

Hey does anyone sleep with one? Not sleep with it on but turn it on in the midddle of the night for pain? I swear I am almost to the point of giving my left arm to get more than 5 hours of sleep a night.