TENS (Transcutaneous Electrical Nerve Stimulation) units are medical devices that manage pain by delivering low-voltage electrical currents through electrodes on the skin. This stimulation helps reduce pain by blocking pain signals and promoting the release of endorphins.

Key components include:

• Electrodes: Applied to the skin near the pain area to deliver electrical impulses.
• Control Unit: Adjusts the intensity, frequency, and duration of stimulation.
• Lead Wires: Connect electrodes to the control unit.
• Power Source: Typically battery-powered for portability.

TENS units are commonly used for acute and chronic pain relief, including back pain, arthritis, and nerve pain, offering a drug-free option for pain management.