Weight is an important sign of children's health. If the child's weight increases regularly, it means that the child is healthy during this period. On the other hand, if the weight does not increase or the growth slows down, it means that there may be improper feeding, illness or other reasons. Therefore, weight is an important indicator of children's regular physical examination. When the child's weight has not increased, parents should cooperate with health care doctors to analyze the reasons and take corresponding countermeasures in time. The most common reason why children are not fat is improper feeding, that is, the food they eat can not meet the needs of growth and development. For example, when the baby does not add various complementary foods in time and reasonably after 4 months, the total amount of food consumed by the baby is insufficient; Or only add carbohydrates such as rice flour and porridge to the baby, without adding egg yolk and fish rich in protein, so that the child's protein intake is insufficient; Some children have the bad habit of being picky eaters, partial eclipse and eating snacks, which leads to the lack of certain vitamins or trace elements such as iron, zinc and copper in the body, further causing loss of appetite and affecting children's growth and development. When children suffer from various diseases, they will also show that they have not gained weight. When sick, due to loss of appetite, gastrointestinal indigestion, increased consumption of fever and diarrhea, the body's nutrients can't make ends meet, resulting in the child's weight not increasing. Common are recurrent respiratory tract infections, diarrhea, parasitic diseases such as ascaris, tuberculosis and so on. Besides not gaining weight, these diseases have corresponding symptoms. You can go to the hospital and ask a doctor for careful examination and timely treatment. In addition, some children lack sleep and exercise too much can also cause weight loss. Parents need to be reminded that the growth of children's weight is not a linear process, but a certain law. At the beginning of birth, the weight gain is relatively fast, then it gradually slows down, and then it increases rapidly in adolescence. Generally, after 3 months of birth, the baby's weight can be doubled compared with that at birth. In the first year after birth, the baby's weight can increase by 6 kg, and in the second year, it will only increase by 2-2.5 kg. From two to ten years old, the annual weight gain is only about 2 kilograms. Therefore, when the child is about 1 year old, parents tend to be very anxious. Why is the child's weight gain significantly reduced? Actually, this is normal.