They put electrodes on my feet and legs to send different nerve signals to the damaged nerves so your brain may start to send non pain signals to the areas your are having pain. I think the problem was that I was the only patient they had tried at my clinic so they kept moving the electrodes around. I have read that better results are reported when the medical staff has more experience using the machine. I believe that the Mayo Clinic reported better results with more experience also. I did not have any improvement and had to pay out of pocket. It was worth trying though because you just never know what I might help. I keep searching and hoping for a cure!