The easiest way to determine the anorexia stage is mainly based on the baby’s usual performance can be, anorexia of the baby’s main appetite loss, but there is no sick performance, then may be in the anorexia stage. Anorexia is mainly manifested in the baby’s appetite, do not like to eat milk, or even refused to eat milk, weight gain is slow and so on. The anorexia stage is mainly due to the increased ability of the baby to absorb protein from milk after 3 months, thus increasing the workload of the liver and kidneys, which is manifested as a decrease in appetite, or it may be that the baby is in the state of teething, and teething will cause discomfort to the baby, leading to the baby’s dislike of milk. Anorexia should be alerted to other causes of illness, such as oral pain caused by oral infections resulting in decreased food intake, respiratory infections resulting in nasal congestion in infants with anorexia, acute gastroenteritis and other causes of abdominal pain, fever and other causes of infants to cry and do not want to eat. Anorexia usually lasts for a few days to half a month, and if the baby continues to lose weight or even lose weight, the baby should go to the hospital.