I'm a concerned dad of a 14 year old I suspect of secretive vomiting (in the bathroom claiming she is just coughing). I have not detected any of the hallmark signs of bulimia (marks on fingers and hands, yellowing of fingernails, swollen glands).

She is a beautiful, creative, girl - and thin, but within healthy standards. Plays sports, but not to excess. Eats sporadically, but at odd times (2am?) but generally healthy stuff (and reads all the package labels). No binge eating that I can tell.

Although she is thin her friends call her "Fatty" and she has taken to writing this on her hand. When asked about it, she says it is just a joke. A joke I don't get.

I have detected what I think is the possible residue of her vomiting in the sink. Is there any foolproof way of determining exactly what is going on behind the bathroom door...or am I just over concerned where none is warranted? thanks