Well, for a start, do you throw up on purpose or because you feel sick?

I've spent quite a while looking around on the internet and many places mention binging and purging to go along with anorexia... not just purging, but it definitely exists, I know. One place that talks about it a bit is this:

http://www.magellanassist.com/mem/li...asp?TopicID=99

You could also take the Eating Disorder quiz.