Transcutaneous electrical nerve stimulation (TENS) is a non-invasive method of pain management that uses mild electric currents to stimulate nerves for pain relief. Small pads containing electrodes are attached to the skin and connected to a battery-powered device. The device delivers electrical pulses to sensors located close to the skin's surface and along the path of specific nerves. https://logcla.com/blogs/495218/Transcutaneous-Electrical-Nerve-Stimulation-TENS-How-It-Works-and-Its