Taking drugs for pain-relief is not always a good idea, especially when the pain is a long-term chronic condition or the circumstances don't allow for it. Technology has a solution for this in the form of the Transcutaneous Electrical Nerve Stimulator (TENS Machine). Although its sounds a bit like a robot from the future, a TENS Machine is actually a portable pain-relief device that can be carried around whilst you go about your daily routine.
The TENS Machine consists of a central battery-powered unit and a collection of electrodes connected via wires. The electrodes are placed onto the skin and the machine attaches to a belt or pocket. The device works by emitting small electrical pulses that interrupt the pain signal before it reaches the brain. The sensations felt are mild tingling pulses that are non-intrusive.