what is a tens unit

A TENS (transcutaneous electrical nerve stimulation) unit is a small, battery-operated device that delivers mild electrical currents through electrodes attached to the skin to relieve pain. The electrical impulses can block or change the perception of pain signals in the brain, and may also release endorphins and other substances that help to reduce pain. TENS is used to treat a wide range of conditions, including arthritis, period pain, pelvic pain caused by endometriosis, knee pain, sports injuries, and fibromyalgia. It is also sometimes used as a method of pain relief during labor. TENS machines are small and lightweight, so they can be used while working or on the move. They are adjustable, allowing the user to control pulse width, intensity, and frequency. TENS is generally considered a safe and noninvasive method of pain relief, but it is not safe for everyone to use, and it is important to check with a healthcare provider before trying it.