I’m sweating too much?

Hi! I have a pretty big problem, I sweat too much.

I’m 16 and sweating has got to the point where I can’t wear tight or light clothes because then it’s visible. I can wear lighter clothes but it doesn’t help, I can just sit but I’m still sweating. I don’t know what to do and deodorant just doesn’t cut it anymore.

What do I have to do?