Certain signs can give you a hint: you’re never happy with your weight and it obsesses you, you isolate yourself and avoid meals with other people, your eating habits have changed a lot (you hardly eat any more or, on the other hand, you eat too much), you feel guilty after eating, etc. Once these signs have been identified, get support from trusted people like your parents or a friend and consult a health care professional. He/she is the only person who can diagnose an eating disorder.