What Is TENS Therapy? Understanding the Science Simply TENS stands for Transcutaneous Electrical Nerve Stimulation — a clinically proven, internationally recognized electrotherapy treatment that uses mild, safe, and carefully controlled electrical impulses to block pain signals, stimulate natural pain-relieving chemicals in the body, and restore normal nerve function — all without a single tablet, injection, or surgical procedure. Here is how it works in simple, everyday language — Your body experiences pain when damaged or irritated nerves send pain signals upward through the spinal cord to the brain. The moment your brain receives these signals, you feel pain. TENS Therapy interrupts this entire process by delivering gentle low-frequency electrical impulses through small electrode pads placed directly on the skin over the painful area.