If you've had physical therapy before, more than likely you may have heard of electrical stimulation. A machine connected to pads to help reduce pain. TENS units have been created for that same purpose, but available to the public for home treatment. TENS stands for Transcutaneous Electrical Nerve Stimulation. It is a small, lightweight, handheld device that produces electrical currents to electrode pads that attach to your skin. You will feel non painful, tingling sensation