I sweat dramatically more since I started T, and from more places. From what I understand, it's pretty normal. Like Victor said, I also run about a degree hotter than I used to. (This isn't a bad thing for me. Before I started T my healthy baseline temperature was like, 97 F, so I'm actually in a more normal range now.)
Talk to a doctor if you're concerned. But as long as you stay hydrated, it's probably not a huge deal.