everything i have read about tens and interferential therapy as well as the rebuilder is that it improves circulation of the blood. It is suppossed to relieve pain, reduce swelling, speed the healing of wounds and fractures, and restore function associated with muscle weakness.

For pain it is suppossed to block the pain signals to the brain, and for reduced swelling and healing of wounds and fractures it is suppossed to be mainly due to increased blood circulation. How did you get a tens machine? Was it prescribed by a doctor for your PN? or for something else? Ask the doctor who prescribed it if its ok to use on your PN if it wasnt prescribed for that.