I'am suffering from excessive sweating problem. My age is 16. I really sweat very bad in humid season. It is very difficult for me to sit in the classroom. My shirt and trouser gets wet with sweat.:(

I have been trying to find the answer for this. You might check with the doctor to see if you have a specific health problem causing this.
You could have an imbalance of some kind.
Too much caffeine and not enough electrolyte drinks such as gatorade or the amino acid drinks such as Monster that contain taurine might be helpful.