My dad lent me his tens when my neuropathy started. One of my major problems is muscle spasms. While it was on, it felt good because it distracted me from the shooting pains, but if I left it on for more than 10 minutes it triggered deeper muscle spasms. I think it fired my confused nerves up even more and my muscles responded in a terrible way.
I know that some people get relief from them though, but just wanted to advise for people with neurological muscle spasms.