I'm vaping a 0 nic 70/30 juice. I just left the doctor and he of course said to stop vaping and the skin condition will go away.I cant imagine it is from vaping itself, but more related due to either getting nicotine on your fingers and not washing your hands right away, or the type of metal your device is made from. Do you have any sort of leaking with your device? I know when I first started vaping high nicotine the inside of my mouth was peeling and it was raw and sore. So this is the only thing i can think of other than dehydration drying you out but if you think it is a chemical reaction make sure your device is not leaking and you don't get nicotine on your hands. When your hands are sweaty and a slight smudge of juice gets on you it is hard to tell it is there. You may also try wearing a glove when you vape to see if that remedies the situation. If it does then it is something that is making contact on your skin not the vaping itself.