How can i stop or control sweating from my butt?

Gosh i never thought i would ever have to type that but fuck it. I've been suffering from HH since i was in elementary school (im 18 Y/O) and it started with my hands, then it spread to my feet and currenty the lower part of my butt. I dont really mind sweating from my feet and my hands while yes its annoyin AF i learned how to live with it. But now, i cant even go out and walk outside for too long before my pants start getting sweat stains back there and making it look like i just pissed myself or something. I've tried using an antitranspirant i bought from the drugstore but it did next to nothing and the only "solution" i've found is too wear a pair of shorts UNDER the pants im currently wearing to prevent the sweat from creating visible stains.It's seriously making my life a living hell and i just dont know what to do. Help?