I too had probs (still do) with itchy skin around nipple ( panicked also re Pagets) saw GP all okay and now use Betnovate cream soon as i feel any itch, it works wonders, had the itch a little more during hot spell, but normally go weeks without any probs..
I noticed i got the itch when wearing certain bra's so must have been something in the lining.. so got rid of any bra that caused the itch, now only have 4 bra's in my drawer..x