Hi, I have a TENS unit. I used it a lot when I first got it and did notice that it helped. I don't even know why I stopped using it, too much of a bother maybe? My doctor wrote me a script
for it so I really don't know the cost.
I doubt if the pads would stay in place all day on the one that I have. I also think that there is a certain time limit to have it on but not sure. I am sure that someone else that actually read the paperwork about using it will chime in.