I really want to get rid of my stomach issue. 17 y old only .I need to feel the totally empty stomach after come out from toilet. I leave my house in early morning and throughout the day then onwards I always feel like going again to toilet because my stomach is not clean. It makes me upset and I can't concentrate on my work. I don't know how to tackle this. What is the best way to clean the entire stomach? Please suggest some easiest way.