Tens machine anyone one tried it?

My physio has lent me a tens machine so far i havent really found it to help. I have herniated discs in my neck. Anyone else tried it. And if so at what setting thanks for your replies inadvance.

Hi, i use a tens machine on my back and find it helps a lot, I use it in on a low setting for around 40mins, along with a heat pad which also helps. 

Tens unit helps very little for pain.

Sometimes helps inflammation. I have one for years and don't use bother using it.

do not put on or near the disc or nerve damage as will make pain unbearable and worsen nerve inflammation.   Was told needs to be put on different area of your body so your brain can focus on that.   unfortunately I was in so much pain with nerve damage the extra from the tens machine sent me over the edge!    LOL