It's perfectly normal and you don't need to do anything to it. Nearly all babies get it, it is believed to be related to the levels of hormones dropping after being in mum's uterus but I don't think anyone knows for sure. I can't believe the paed didn't know that!! The real name is millia but it's also called milk rash, probably because babies only drink milk then, but it's not related to the milk at all.