He showed me the 'white stuff' and it turned out to me the skin around his mosquito bites, where he had itched it so much that it turned up the dead skin (I think) and made it look white. I just told him it's his mosquito bites, and that he needs to get some cream so he doesn't itch them and make them bleed (he'd already made a few bleed).
So he runs around telling my other siblings (Sydney, Shelby, and Thaxton) and my mom that he has a "paskeeto bite! I have a paskeeto bite!"
I love it when little kids have speech impediments. See that search bar somewhere around here? I think it's at the bottom of the page. Type in 'star wars' and you'll see why there are some reasons I love having younger siblings that don't quite talk correctly.