At the present time, research into Eating Disorders is being carried out in very different areas: clinical and diagnostic, epidemiological, comorbidity, aetiopathogeny, treatment and forms of care. This paper reviews this type of pathology, and aims to update the most important data in the different fields. The epidemiological studies of recent decades would indicate a considerable increase in the rates of incidence and prevalence of both Nervous Anorexia and Nervous Bulimia. On the other hand, there is increasing confirmation of an early appearance of these disorders. Similarly, the discovery of certain physiopathological appetite markers and/or regulators opens a new path for understanding this phenomenon. Research into these problems has reached a certain consensus in aspects such as: a multidimensional consideration of the ethiopathogeny, increasingly purified diagnostic criteria, care and therapeutic procedures and resources to be used in treatment.