What is a tens machine?

Pain Management Unit: "tens" is the acronym for transcputaneous electrical nerve stimulation. A "tens unit" is a pocket size, portable, battery-operated device that sends electrical impulses to certain parts of the body to block pain signals. The electrical currents produced are mild, but can prevent pain messages from being transmitted to the brain and may raise the level of endorphins.

External stimulator: A tens unit is an external transcutaneous nerve nerve stimulator. Tens unit works by the melzack gate control theory of pain. The way the unit works is, continous nerve stimulation at a different site from the pain site, provides continous nerve stimulation flooding the gates which will help decrease nerve pain transmission from the site of your pain. It definitely has benefit in decreasing pa.