What is TENS and how it works is very important to know before to start using them. TENS stands for Transcutaneous Electrical Nerve Stimulations offering drug free method for pain management. TENS machines send electric pulses across the surface of the skin and along the nerve strands. The stimulating pulses help prevent pain signals from reaching the brain. Tens devices also help stimulate your body to produce higher levels of its own natural painkillers, called “Endorphins”. Electrode pads play an important role for its complete pain management solution. Use electrode pads only on normal, healthy, clean and dry skin to make them functional without any side effects. Quality of electrode pads should be good as they are in direct contact with your skin and can damage your skin if not used as per their guidelines.