A friend of mine has had a horrible rash all over his body for about 2 months now. He has been to see doctors but they don't know what it is. It started on his face but has spread over his body and it does look like chicken pox, but that normally clears after a week - 2 weeks ish. Can anyone help, its like blisters and they itch, which is why I thought chicken pox, but surely not for this long?