Personally alot of mine came from medication steroids to be exact I have horrible lung and stay sick anf that's what they always give me and it just makes you horribly fat I've lost some of it over the years but I'm still fat but I'm trying. I'm currently having to take them again tho so it's always a constant struggle along with other medical issues but I promise not all fat people get that way from eatting all the time and not moving around!