Anorexia nervosa, also known as anorexia nervosa, is a condition in which the patient intentionally causes a significant weight loss to below the normal physiological standard weight, a weight loss of more than 15% of the normal average weight loss, or a Quetelet body mass index of 17.5 or lower, at which point there is still a fear of gaining weight or refusing to eat normally. And try to maintain this state of a psychophysiological disorder. It is mostly seen in adolescents, with the onset mostly between the ages of 13 and 25, with more females. Socio-cultural factors, family factors, personality pursuit of perfection, immaturity, dependence, strong demand for obesity and excessive concern for body image are central. There is excessive exercise, hyperventilation after eating, laxatives, diet pills there is emotional depression prone to outbursts, venting. Hypersexuality, menopause, severe malnutrition, organ hypofunction, metabolic disorders. 3 months Bulimia nervosa This disorder is a periodic episode of uncontrollable overeating that can occur in anorexia nervosa, but is not necessarily accompanied by this symptom. The two main components of this symptom group are the uncontrollable compulsion to eat more, and the attempt to vomit to avoid weight gain, and sometimes the abuse of laxatives. The weight of these patients often remains within the normal range and the female patient can still have normal menstruation. It is more common in women. 1. Episodes of irresistible desire or behavior to eat, with large amounts of food in a short period of time. The episodes occur at least twice a week and last for at least 3 months. 2. There is a fear of gaining weight. 3, often use induced vomiting, induced diarrhea, increased exercise and other methods to eliminate the fat caused by overeating. 4.It is not bulimia caused by organismic lesions of the nervous system or secondary to epilepsy or schizophrenia. Emotional disorders are more prominent than anorexia nervosa. Anxiety, anger, restlessness and vomiting can cause dental caries, swelling of parotid glands and electrolyte disorders. Neurotic vomiting mostly occurs due to unpleasant circumstances or psychological tension. Repeated involuntary vomiting episodes, usually occur after eating, sudden jet vomiting, no obvious nausea and other discomfort, does not affect the appetite, vomiting can eat, more weight loss, no endocrine disorders, often with hysterical character, manifested as self-centered, good performance, easily suggestible. No fear of fat psychology is concerned about their health. A small amount of anti-anxiety, or sulpiride effective.