Transcutaneous electrical nerve stimulation (TENS) uses low-voltage electrical currents to relieve pain. A TENS unit is a small device that delivers the current at or near your nerves to block or change your perception of pain. Healthcare providers use TENS to treat a range of conditions, including osteoarthritis, tendinitis and fibromyalgia.

Transcutaneous electrical nerve stimulation (TENS) is a type of pain relief therapy. It uses a low-voltage electrical current to block pain or change your perception of it. TENS therapy works well for a lot of people. And researchers agree that it tends to work better for some than others. But there’s not enough research to explain exactly why. Researchers are still working to find out more information. Most experts believe the electrical current helps release pain-reducing chemicals that your own body produces.