Eating disorders are usually developed by teenagers and adolescents. The characteristics are disturbed views considering food, the negative body image and disrupted self-esteem respectively. There are three main types of eating disorders: anorexia, bulimia and compulsive overeating. Besides them, there are non-specific forms of eating disorders that can not be classified into one of three basic types, but remain a serious problem Biological, psychological and social factors have important role in development of eating disorders . Often cited biological factors are age, gender and body weight, whilst the psychological factors that play an important role are self-esteem, perfectionism, and satisfaction with body image. When it comes to social factors often cited are the influence of media, peers and parents on body image. Hospital treatment programs of anorexia and bulimia are a combination of several elements, including a recovery diet, medical recovery, psychotherapeutic treatment, family treatment and psycho-social recovery. The exact combination of these different models of treatment will be different, depending on the age of the patient and his or her individual situation. The role of the nurse is taking a nurse anamnesis, and holistic approach to the patient. The most important role of nurse is to help the patient and family to accept disease and motivate patient to cope with the disease actively, and successfully.