TENS is abbreviation for "Transcutaneous Electrical Nerve Stimulation" and EMS is abbreviation for "Electrical Muscle Stimulation". Electrical stimulation for the treatment of muscles aches and pains in the body has been used for many years by physiotherapists. The electric signals sent to the muscles allows for relaxation and healing of the muscles and nerves to happen. Now, you are able to treat yourself at home with the latest in digital TENS units that is completely safe with the approval of FDA, CE and Health Canada. For more information, see articles below.