TENS is shorty for Transcutaneous Electrical Nerve Stimulation, which is mostly used for nerve related acute and cronic pain conditions. A TENS machines works by sending tiny stimulating electrical pulses through the surface of the skin and down the nerve strands.
The stimulating pulses cab help to prevent pain signals from fully reaching the brain. Tens devices can also help to stimulate your body to produce higher levels of its own natural painkillers, called Endorphins.
TENS machines can really help with back and neck paina that may be caused by a trauma or by continual strain.
The body often responds to such a pain with muscle guarding, in an attempt to immobilize the painful area by tightening up the muscles. Muscle guarding often impairs circulation in the affected areas. The decrease in the supply of blood can lead to a decrease in the metabolism with an acompanying accumulation of waste products.
TENS therapy (transcutaneous electric nerve stimulator) can really help to break this destructive pain cycle and can aid in the body's own normal healing process.