1, the causes of childhood obesity and harm Obesity refers to excessive accumulation of body fat, weight more than the length of the average standard weight of 20%. Medical weight more than the length of the average standard weight of 20% of the children, known as pediatric obesity. More than 20-29% for mild obesity, more than 30-49 for moderate obesity, more than 50% for severe obesity. Pediatric obesity is generally believed to be related to the following factors: (1) over-nutrition over-nutrition caloric intake over consumption, excess calories in the form of triglycerides stored in the body to obesity. Improper feeding of infants, such as every time the baby cries, immediately feed the milk, over time to develop a habit, and then every frustration, you want to find something to eat, easy to cause obesity in infants, or too early to feed infants high-calorie solid food, so that the weight gain is too fast, the formation of obesity. Excessive nutrition in the late stages of pregnancy, become the cause of postnatal obesity. (2) Psychological factors Psychological factors play an important role in the occurrence of obesity. Emotional trauma or psychological disorders such as parental separation, loss of father or mother, abuse, spoiling, etc., can induce timidity, fear, loneliness, etc., which results in social inappropriateness, less activity or self-indulgence in eating, leading to obesity. (3) lack of activity once the formation of obesity in children, due to mobility, more reluctant to activities, so that weight gain, the formation of a vicious circle. Certain diseases such as paralysis, primary myopathy or severe intellectual backwardness, resulting in too little activity, calorie consumption is reduced, obesity occurs. (4) Genetic factors Obesity has a certain family genetic predisposition. Both parents fat, offspring 70% ~ 80% obesity; one of the parents obesity, offspring 40% ~ 50% obesity; both parents have no obesity, offspring only 1% obesity. Monozygotic twins with the same disease rate is also very high. (5) central regulatory factors The normal human body exists in the central energy balance regulation function, control weight is relatively stable. Some children have imbalance in the regulation function, which leads to excessive intake, exceeding the demand, causing obesity. ※ Harm Traditional concepts, especially the elderly, that children are fat is nothing, and even think that fat is healthy, fat as a symbol of “blessing”. In fact, this is the wrong point of view. Obesity in childhood, not only will affect the body shape, more importantly, is the formation of adult obesity, hypertension, coronary heart disease, diabetes, etc., the main factors, will bring a lot of potential health hazards. Once the children are obese, due to the body fat percentage increase, acidic metabolites excretion is not sufficient and increased accumulation, children will often feel tired and sleepy, sleepy, do not want to activities; and because obesity leads to water, sugar, fat metabolism disorders, high insulinemia and the emergence of abnormal hunger, manifesting itself as a craving for special gluttony. This will easily contribute to the formation of children’s inertia, become both gluttonous and sleepy, the formation of more and more fat, the more fat the more problems of the vicious circle. The more obese, the more gluttony, the more lazy, the more unwilling to exercise, lose the kind of children’s innocent and active nature. Children’s obesity, 90% will grow up to become a big fat. Studies have found that 40% of obese children have been complicated by abnormalities of lipid metabolism, these are high blood pressure, atherosclerosis, coronary heart disease, cholelithiasis causes. Nearly half of the obese children have developed fatty liver. Obesity can cause children’s sexual development abnormalities, some children will be caused by obesity leads to sexual development disorders, boys appear cryptorchidism, breast enlargement and other sexual organs and sexual characteristics development disorders; girls appear precocious puberty or menstruation abnormality, leading to sexual dysfunction and reproductive impotence in adulthood. Obesity can also affect the development of children’s head shape, stupid type tendency. It is also easy to grow into X-shaped or O-shaped legs and flat feet. Self-supporting ability of life decreases, the body resistance decreases, easy to detain and suffer from digestive and respiratory diseases. Excessive obesity leads to a decline in the function of the respiratory system, the concentration of carbon dioxide in the blood rises, the cerebral cortex is lacking in oxygen, the children’s attention is not easy to concentrate on learning, affecting the intellectual development of children. A controlled study of obese and normal children from a psychological point of view found that obese children have an impaired sense of self, low self-evaluation, do not fit in, have more anxiety than normal weight children, and have a poor sense of well-being and fulfillment. This impaired sense of self increased with increasing obesity. Changes in body size, loss of physical strength and the embarrassing symptoms of obesity cause psychological stress in children, resulting in low self-esteem, isolation and personality perversion, leading to serious psychological developmental disorders in children.