Body issue questions

Dominique
What causes so many women to have body image issue? I've been sitting in my classes today and I'll I've hear from a few girls is that they need to lose weight or that they only eat oranges so they don't get fat and I just looked at them really confused. What causes teenage girls to have really big problem with how they look and their weight? I personally don't understand what causes girls to put themselves under so much pressure to look "good"