A TENS device (abbreviation for Transcutaneous Electrical Nerve Stimulation) is a small device used to relieve pain by sending mild electrical impulses to the nerves through the skin using electrodes (patches).<br /><br />How does it work?<br />• The device's patches are placed on the skin over the painful area.<br />• The device sends low-frequency electrical impulses to the nerves.<br />• These impulses:<br />• Block pain signals from reaching the brain.<br />• Stimulate the release of endorphins (the body's natural painkillers).<br /><br />TENS is used to relieve pain associated with:<br />• Chronic back pain.<br />• Neck and shoulder pain.<br />• Knee and joint pain.<br />• Arthritis.<br />• Nerve pain (such as sciatica).<br />• Pain following surgery or injury.<br /><br />When is it not recommended?<br />• If you have a pacemaker.<br />• During pregnancy (unless under medical supervision).<br />• If you have epilepsy or serious heart problems.<br />• On injured or ulcerated skin