The baby is very thin, not growing meat for the following reasons: First, the baby is affected by genetic factors, such as the parents’ body type is thin, the baby will be affected by genetic factors, there will also be very thin, not growing meat, but the child’s height is generally within the normal level, is normal. Second, when there is a nutritional deficiency, malnutrition, etc., the child will have a very thin, no growth of flesh, at this time to check in detail whether it is caused by a lack of trace elements or whether there is a growth disorder disease. If there is a deficiency of trace elements such as calcium, iron and zinc, it will affect the appetite of the child and the growth and development of the child, and the child will be thin and paranoid. Appetite, to promote the growth and development of children. Third, it may be caused by disease, such as hypothyroidism, growth hormone deficiency caused by thinness, you need to take the child to the pediatric department or pediatric endocrine clinic for detailed examination, according to the actual cause of the child to give further treatment.