I have a special rash that only appears during my pregnancies. In fact if it "blossoms" then I know that I'm pregnant. It's only from my arm pits to under my breasts. Yes, it's lovely. ;oP I hate it, but that's my body. I have no idea why it happens. I've been pregnant 4 times and had one miscarriage--and it was there each time and went away a few weeks after I delivered.