I don't know if this is the right place to ask but I'll ask anyway.

I'm 17 years old and I've got a huge problem that's killing my confidence. I don't know what the cause is but I'm sweating much. Even at a cool climate, I'm having wet armpits and stains on my shirt. What are some remedy for this? Have you had similar issues, how did you overcome it? Might puberty be the origin? PS: I'm not obese