Ok I don't have a disorder, not at all, but statistically it looks that way becauase I weigh less than 65% of the acerage weight for my age and height. I'm only an inch under average height. I don't starve myself, and I've been trying for a while to put on weight, it just never worked so I gave up. CAn anyone help me? I've been underweight all my life, maybe it's not a problem because my body's used to it? I just want to do something as quickly as possible. I suffered from anorexia as a child but don't anymore, maybe that is a reason? Just... any advice will be appreciated... thank you,.