Anorexia and bulimia nervosa.

Anorexia and bulimia nervosa are eating disorders characterised by abnormal eating behaviour, a morbid concern over body weight and a distorted perception of body size. It commonly occurs in young postpubertal girls in developed societies. Aetiological factors are a complex interplay of biological, psychological and social factors. Bizarre eating patterns can lead to life-threatening medical situations which require urgent in-hospital care. Comprehensive management should be effected by a multi-disciplinary team with contributions from the internist, the psychiatrist, the nurse, the psychologist, the social worker and the teacher. There is significant psychiatric morbidity and mortality in the outcome of these eating disorders.