Children’s obesity by a variety of factors interacting with the onset, clinically divided into simple obesity and pathological obesity two categories, including simple obesity in childhood most common, about 95% of the total number of children obese; pathological obesity is also known as secondary obesity, is secondary to other diseases and produced, only 5% of children obese. 1, genetic parents have one is obese, its children obesity chance for 40% to 50%; parents are obese, its children obesity chance for 70% to 80%. 2, eating habits If parents allow children to eat high-fat and high-calorie food, and often want them to eat all the food provided, and even to reward the way to encourage children to eat, easy to make children become obese. 3, psychological compensatory effect when children are psychologically disturbed, nervous or frustrated, will find sweet, high-calorie food, to constantly eat to fill the psychological disturbed, develop the habit of eating too much. 4.Take medication Such as anti-allergy drugs, sex hormones, steroids, antidepressants, anti-epileptic drugs, etc. 5, physiological factors may originate from the patient’s own metabolism is more hyperactive, endocrine disorders, chromosomal abnormalities, the brain control satiety hunger center out of control or disease and other factors. According to the characteristics of the growth and development of children, children have two periods that are prone to obesity: one is the infancy period, and the other period is the stage from 5 to 10 years old. In these two periods, all exist at the same time fat cell quantity increase and fat cell volume increase two processes. Only in infancy the increase in the number of adipocytes is dominant, while in childhood the increase in the volume of adipocytes is dominant. The number of adipocytes that increases in both periods does not decrease later in a person’s life. Therefore, in these two periods are rapidly obese children, later if excess nutrition, make fat cell volume increase, are likely to present obesity. 6, the amount of exercise is reduced now children’s schooling is heavy, activity space is less, the amount of exercise is obviously not enough. Sitting in front of the computer and television set every day for too long, itself obese children do not like to exercise, so that a vicious circle is formed to accelerate the formation of obesity.