The absence of visible symptoms is not the most accurate measure of someone's recovery from this disease. Weight is a physical thing, but anorexia also resides firmly in the psyche. Anorexia is like having the person who hates you the most, the most irrational tyrant you can imagine, living in your head rent-free, trying to burn down your physical foundation from the inside out. It's an interminable abusive relationship that's nearly impossible to leave because it transpires in your own mind. Those voices can cause problems before the weight loss starts to show.