Sometimes I feel like I sweat more than the average female. This is why I hated high school gym class so much, especially if my gym class was scheduled early in the school day, because then I'd spend the whole day feeling gross. I'd avoid wearing certain fabrics or colors to make underarm sweat less conspicuous, and I'd pat powder on my armpits after applying antiperspirant to make sure they stayed as dry as possible. I'd also carry tissues in my pockets just in case I needed to blot my face.
This was more of a problem in middle school / high school, but not so much now. I guess puberty was to blame?