I think the best thing you can do is continually support your daughter. As long as you are there to tell her that she is fine the way she is and even see if she will talk to you about why she feels the way she does. You don't necessarily have to understand what she feels like inside but empathy can go a long way when someone is hurting. I also suggest that you research the condition and learn as much as you can. This will aid in you being able to understand where she is coming from on her feelings.