Transcutaneous Electrical Nerve Stimulation (TENS) is a method of pain relief that involves the use of a mild electrical current to reduce pain signals going to the spinal cord and brain
. A TENS machine is a small, battery-operated device with leads connected to sticky pads called electrodes, which are attached directly to the skin
. The electrical impulses can help relieve pain and relax muscles, potentially stimulating the production of endorphins, the body's natural painkillers
. TENS is used to treat a wide range of conditions, including arthritis, period pain, pelvic pain caused by endometriosis, knee pain, sports injuries, and more
. It is sometimes used as a method of pain relief during labor
. However, there is not enough good-quality scientific evidence to say how well TENS works, and its effectiveness depends on the individual and the condition being treated
. TENS is not a cure for pain, and its benefits can be short-term in nature
. To use TENS, healthcare providers recommend placing the electrodes on acupuncture points
. The duration of pain relief after using a TENS unit can vary, with some people reporting instant relief that lasts as long as 24 hours
. A 2012 review suggests that the duration of pain relief increases after repeated TENS treatments
. However, it is essential to consult a doctor before trying TENS as an alternative treatment or in addition to usual medical treatments
