Anorexia nervosa is a kind of eating disorder caused and maintained by itself, which is manifested as anorexia, weight loss, and even anorexia due to dieting, often causing malnutrition, metabolic and endocrine disorders and physical dysfunction. The most basic symptoms of anorexia nervosa are anorexia, extreme lack of appetite and emaciation. This symptom is mainly related to psychological factors, not caused by organic diseases of digestive system. The onset age of this disease is 10-30 years old, mostly 15-23 years old. Female patients are about10-20 times higher than men. Due to the change of social atmosphere and lifestyle, the incidence of anorexia nervosa has greatly increased or decreased. Acute mental trauma or persistent depression may lead to this disease under certain conditions. Recently, the number of girls with anorexia nervosa caused by blind weight loss and excessive dieting in Shanghai has gradually increased. The data of the Municipal Children's Mental Health Center also shows that the incidence of the disease has tripled compared with the same period last year. Its main clinical manifestations are: at first, there was the psychology and behavior of deliberately dieting for fear of obesity, and then there was uncontrolled eating and rapid weight loss. The emaciated elephant cachexia still refuses to increase its food intake, and even feels too fat when it is infinitely thin and fatal. Refuse to keep the weight at the lowest level corresponding to their age and height, so that some patients are skinny and unable to get out of bed, some people starve to death, some use exercise, vomiting, venting and other means to lose weight, sometimes overeating, vomiting after meals, and lose more than 25% weight. Due to hypoglycemia, nausea, dizziness, fatigue and sometimes syncope often occur. Extreme malnutrition such as dry skin, pale skin, poor elasticity, thin subcutaneous fat and skin edema caused by hypoproteinemia. Accompanied by severe endocrine dysfunction, female amenorrhea, male libido loss or impotence. If it happens before puberty, puberty development slows down or even stagnates, breast dysplasia, male secondary sexual characteristics are undeveloped, and genitals are childish. This kind of patients often have emotional instability, anxiety, insomnia, obsessive-compulsive ideas, and some will also lead to secondary depression and morbid psychology. In severe cases, they may have suicidal thoughts and behaviors. It should not be ignored that many girls generally lack knowledge of anorexia nervosa, and girls who blindly pursue slimming and deliberately diet suffer from anorexia nervosa and dystrophic muscular atrophy to varying degrees. Diagnostic criteria of anorexia nervosa: (1) The standard weight of the same age and height is less than 15%, and the original weight is reduced by 25%; (2) Pursuing slimness, intentionally controlling diet and being willing to starve; (3) Women who have been in menopause for more than 3 months; (4) Slow heartbeat, vomiting, etc. (5) No other physical diseases or schizophrenia; (6) onset age 10 ~ 30 years old. The treatment of anorexia nervosa mainly includes the following aspects: (1) Psychotherapy: First of all, we should get the cooperation of patients, understand their causes, give cognitive therapy, behavioral therapy and treat fatigue at home. (2) Physical support therapy: according to the characteristics of less food intake, provide a high-calorie diet, and give intravenous infusion or high intravenous nutrition therapy to patients who vomit or refuse to eat. Take multivitamins, and hormone therapy can be given for endocrine changes. (3) Stimulate appetite: Under the observation of a doctor, inject 2 ~ 6 units of insulin into the muscle half an hour before meals until the weight returns. (4) Psychotherapy: antidepressants, lithium antipsychotics, antiepileptic drugs and anti-anxiety drugs can all be used for the treatment of this disease. Commonly used are sulpiride 200 ~ 400mg/ day, cyproheptadine 12 ~ 32mg/ day, amitriptyline 150mg/ day, which has better effect on people who overeat and vomit. (5) Change of ideas. Slim is popular now, and thinness is beauty, which is a trend. The recognition of being fat, thin, strong and thin changes with the guidance of public opinion. It is widespread in some countries and regions in history or now to regard fat as beauty and firmness as beauty. In my opinion, girls are in the period of physical development, so don't blindly lose weight and diet. No matter what the trend is, health is always beautiful. Being strong and plump is more conducive to enhancing resistance and fertility, and it is also sexier, so you can enjoy a good sex life in the future.

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