I have a pinched nerve, I guess. I bought this a while ago for the next time I felt like I had a crick in my neck. I got it at WalMart for about $10. It's like a TENS unit. Today is the first time I've used it. I'd go to the chiropractor tomorrow except it's a holiday:(
So this little electro therapy unit, a heating pad, and Aleve is getting me through.