Why do I have excessive sweating between my butt cheeks?

A very good day to you I can totally understand what you might be going through being a teenager and having such problems. there are a few ways in which we can control the excessive sweating that you got. Initially will drive the non medicated method. if it does not subside with these methods and we will try medications to reduce sweating For the non medicated but you should -try wearing loose jeans - Wear jeans which are made of cotton so that the sweating is less - Wear loose underwear or wear boxers. -apply talcum powder in that area to keep it dry and smelling nic -do not use excessive toilet paper - to keep the area dry as much as possible by regular wiping and cleaning by soft toilet paper - do not be conscious of the problem like try to ignore the problem because if you focus on that then you will sweat more I understand what you might be going through and it is a very relevant problem and we will try to get over it as fast as possible. Try out these above methods and let me know if they work and if they don't then we will go ahead with medication. Hope you problem gets resolved soon. let me know what happens in the follow up