I sweat a lot yet I don't care. Heck, if people say that the more you sweat, the more athletic you are, then I'm definitely okay with it.
Well, anyway, you could use some deodorants, but that probably won't work on your head... It's really just that way, man. If you don't sweat, your body will overheat. Plus, some bacteria or germs are also excreted out of the body through sweating.