What is TENS Therapy? TENS therapy is useful for virtually anyone experiencing pain. TENS is the acronym for Transcutaneous Electrical Nerve Stimulation. TENS Units work by sending slight electrical impulses to certain parts of the body that block pain signals to the brain as well as activating the release of endorphins and encephalins, the body’s natural analgesics. TENS therapy is non-addictive and doesn’t provide dangerous side-effects that are so common with medications and prescribed narcotic pain-killers. To see what these items look like, click here: TENS Units. For more about the benefits of TENS Units, read this information page by clicking here: TENS Units Information. Hope it helps.