The full or partial syndrome eating disorders (ED) affect up to 10% of adolescents, representing a real threat to the health of mankind. Unfortunately, ED diagnosis can be rather confusing and more than 50% of the cases remain undetected. Over the past years, the population have seemed to become more aware of this disorders and their real morbidity, due to a large extent to mass-media and vulgarizing publications. Bulimia nervosa is the mental disease which is the most characteristic of ED. Psychiatric comorbidity represented by personality disorders, anxiety disorders, affective disorders, schizophrenia is studied from both an etiopathogenetic and therapeutic point of view. The understanding of ED association with chronic organic pathology is necessary for the investigation and formulation of hypotheses regarding ED ethiopathogeny; for the prevention and understanding of ED complications induced by chronic organic diseases and their treatment, for the early diagnosing of ED in the context of chronic organic disorders with a view to their adequate treatment.