I think kids w/ allergies/intolerances are more prone to it b/c iirc it's a form of eczema in a way. The boys had it pretty bad and had little patches till they were 2 or so, you just couldn't see it. Olivia had it for a few wks and now her head looks great!

I still feel like I'm missing something though w/ her, but I am eliminating more earlier w/ her than I did w/ the others so maybe that's why her head looks better than theirs did?