As your daughter starts worrying more about how she looks, especially when compared to her peers, you’ll see her trying to take charge of her own eating habits. Some tend to fast thinking it will help with weight loss, others do this similarly but with controllable binging followed by vomiting it out.
None of these habits are healthy or should be encouraged. Try to find the source of the problem – is your daughter worried about bullying, or underperforming in a sport, or is there another reason that has put her off eating?