Last year before I moved my ortho doctor gave me a TENS Unit to use on the cross country drive. For the life of me I could not figure out how to use it, so it has sat in my closet for over a year. After meeting someone the other week who uses one regularly I decided to take the old thing out of retirement. ;)
It feels pretty good. Imagine how sheepish I was tonight to realize how simple it was to hook up. I'll blame all the stress of the move for why it took me so long to understand it's function.
Information on a TENS Unit: http://www.livestrong.com/article/30015-tens-unit-work/