Transcutaneous Electrical Nerve Stimulation, is a method of pain relief consisting of a pack of electrode pads placed on the back. It discharges an electrical stimulus that interferes with the passage of pain signals to the brain and may help the body to produce endorphins, its own pain-killing hormones. The pack has a hand-held control, which can be used to vary the strength of the stimulus.

a machine that stimulates nerve fibres through the skin

an extremely safe method of pain control

a small battery driven device

a small unit - slightly smaller and lighter than your average walkman