Hello, i work as a water delivery man. So i always carry water gallons and water cartons. Recently, i am getting skinny and loss weight.. So how gain weight by eating food that doesn't make me stomachaches and diarrhea?
Last time i eat goreng pisang, i get diarrhea. I eat spicy food like ayam goreng McD spicy, i get stomachaches..
I need advice for eat or drinking for gain weight but don't cause my stomach in pain?

But i always drink coffee and tea using diary creamer, will that also give stomach pain?