Have you asked your mch nurse, or your doc if you are going for other reasons?

I noticed xaves pimples flare up a bit when he's warm, and he always has a couple on his chin, which I think is because he's a messy bugger when he eats. I need to wash his face after every feed, but I'm naughty and just pat it dry with a cloth 'cause he usually gets tired and groggy and I want him to sleep, water would wake him up.

does she get warm, or could she be doing little chuck ups down her front maybe?