Summarized, there are several reasons: (1) Too many sweets or snacks: For artificially fed infants, some parents tend to add too much sugar to milk and milk powder, so that the child develops the habit of sweet tooth from childhood. Sweets seem to be the favorite of most children, parents often give a full supply, such as chocolate, milk sugar, fruit sugar, sweet cakes and so on. Often eat sweet snacks, bit stomach always have food, blood sugar concentration is also maintained at a high level, so that the ingestion center is inhibited, while the satiety center continues to be excited, the child does not have a sense of hunger, so anorexia arises. Some parents have understood this reasoning, began to limit the child to eat sweets, snacks, but the child’s appetite does not see any improvement, what is the reason for this? Some people have investigated that most of the children who have lost their appetite never drink plain water, but only sweet drinks, such as orange juice, fruit juice, honey water, soft drinks and so on. Many children drink beverages not because they are thirsty but because they like the sweet taste. These sugary drinks naturally raise blood sugar and the satiety center is excited thus producing anorexia. In addition, a variety of cold drinks on the market in summer, children often can not resist the temptation of colorful cold drinks. Parents are also unwilling to refuse the child’s request, so that the child to eat more cold drinks. Cold drinks in the sugar is high, creating melon children lack of hunger, at the same time, cold drinks stimulate the delicate gastrointestinal tract, easy to make its dysfunction. These can cause pediatric loss of appetite. (2) mental psychological factors; children eat when the mood is not good, often affect eating. This is because the human higher nerve center activity on the gastrointestinal digestion, ingestion, satiety center has an impact. When the mood is bad, the cerebral cortex is less responsive to the external environment, so that the gastrointestinal secretion is reduced, peristalsis is weakened, thus persuading the digestion and absorption of food is also reduced. In this way, food stays longer in the stomach, and people don’t feel hungry and don’t want to eat. Children’s bad mood when eating, including the following situations. ① There is no pleasant eating atmosphere. At mealtime, parents pursue and blame their children for their faults at school or at home, so that the pleasure of eating disappears and their appetite decreases. Children’s emotions are affected by crying, being beaten or scolded before eating, which makes them unable to eat. ② distraction. Children eat, such as attention, through the visual, alas, smell to the food color, aroma, taste “tasting”, thus establishing food conditioned reflex, promote gastric secretion and improve appetite. If the child’s attention is distracted, while listening to stories while eating, while playing with toys while eating, while watching TV while eating or running around, so that parents feed while chasing, half a day to feed a bite, will make the appetite low. ② forced to eat. Under normal circumstances, children eat before the stomach is empty, blood sugar drops, began to feel hungry. If parents let the child eat a snack before eating, hunger will disappear; such as parents let the child drink more water, dilute the gastric juices, will also make its appetite decline; such as parents let the child eat partiality and picky eaters do not want to eat the food, will also cause the child to resent, in these cases, forced eating, will make the child to produce aversion. Some of the adults in the sound of scolding to finish eating, but in the long run, can gradually regard eating as a kind of “drudgery”, to avoid it. It can be seen that this kind of forced eating brought about by pathological psychology, is also one of the reasons that affect the child’s appetite. ④Environmental changes. Changes in the environment make children feel confused, insecure and depressed, which in turn affects their appetite. This often happens when a child is new to a nursery or kindergarten, when there is a sudden change in the child’s nanny or parents, or when a child is admitted to a hospital in a strange place because of illness. (3) Zinc deficiency (4) Vitamin deficiency: Vitamin B1, B2, B12, C, niacin and other deficiencies can cause loss of appetite. These vitamins are widely involved in the body’s physiological and metabolic functions, the lack of which can lead to anorexia, vomiting, gastrointestinal digestive disorders and other symptoms. (5) Children’s physical discomfort or disease: excessive fatigue, lack of sleep and oral ulcers, enteritis, dysentery, typhoid fever, colds, pneumonia and other diseases, all to cause loss of appetite. (6) the role of drugs: children are sick, often have to take a variety of drugs. Many drugs, such as red rayon, wheat border rayon, sulfonamides, dysentery, excessive cod liver oil, etc., on the gastrointestinal tract has side effects, can affect appetite. Many proprietary Chinese medicines, such as Fertilizer Syrup and Longmu Strong Bone Punch, contain more sugar, which can make children’s hunger disappear and their appetite decrease.