TENS stands for transcutaneous electrical nerve stimulation. Which basically means that it is electrical nerve stimulation applied to the skin.
My kids bought me a “revitive”, which is a machine that has a foot base with placements for the feet. These have separate electrodes just for the feet and a separate setting. Then there are two places to add plug ins for TENS pads . I can use other attachments as well and I have glove attachments for my hands.
I also have a small portable tens machine that is rechargeable. I take it with me when I go away. The portable T.E.N.S machine has a lot of functions such as massage, cupping, acupressure, stroking – each with a changeable strength.
There is a reason I am telling you about this!
I have been using my portable one since I strained my back recently – that, along with DMSO helped me considerably.