It was the back of my neck that started itching and then the more I scratched the sorer it got, it was actually little blisters, my doctor said it was dermatitus and gave me some steroid cream which cleared it up, but since then itchy bits keep reacurring in various parts, fir instance if a wear some earrings I can straight away feel a itchy blister coming and also when I dyed my hair my scalp was covered the next day in itchy spots, I have used all these things all my life with no effects so why should it all start now? I am 49 and have had some stress recently but I don't know if that is relevant.