Is it normal for a five-year-old girl to have sweaty underarms?

Q: Is it normal for a five-year-old girl to have sweaty armpits? It's not all the time, but when she's hot (physical exertion or weather). I am seeing sweat marks in the underarms of her shirts.

A: Kids are certainly allowed to sweat in their armpits at any age. What is unusual is significant body odor before the onset of puberty.