Hi ruthie, when u zap the body builds up a positive charge at the positive handhold, this charge attracts the bodies immune cells, this is why it is usefull when zapping to place the positive hold near a site needing healing. Maybee for some reason ur immune system is causing the rash, why I dont know, just an idea,
It is advisable to switch hands during zapping anyway, to prevent this build up of electrical charge at the positive hand hold. I always do, to try and balance things out charge wise during a zapping sension.