but i cant reduce it. What i must do? I am a 15 year old boy. I study in tenth standard.I have Small Protruding tummy.I do not know it is due to what.

I cycle daily, walk and run and do exercises.But i want to reduce my tummy.Everybody tell that i have a stomach.Some one help me to git rid of these speeches and my tummy Pleeeeeeeeeeeeeeeeease!!!!!!!