Transcutaneous Electrical Nerve Stimulation (TENS) is a method used by physiotherapists to provide pain relief by stimulating sensory nerves. TENS machines have been used for years to treat acute and chronic pain. While its effectiveness varies with each patient and type of injury, it can be a soothing method to helping a patient feel more comfortable. TENS machines are small units that are easily transported and are very good for home treatment. Physiotherapists are uniquely trained in setting up and adjusting TENS machine and showing clients how to use them safely and effectively in the home.