Anorexia Recovery & Treatment

I have alwayways wondered if someone can “just become” anorexic or if anorexia is something they are born with that shows after stress in life. I have never had the want to not eat so I would think it’s something you are born with. I know it’s a disease, but is it an imbedded disease? Thanks.

I’ve heard that recovering from anorexia is a process in which one has to “wheedle oneself back up”, but that’s a little vague. How large of a calorie increase and how gradually should this be done in order to not gain weight? And is there more to it than that…?