A newborn baby will eat milk as a matter of human instinct. However, it should be noted that within 3-4 hours after birth, some children are full in the mother’s body and do not eat milk temporarily after birth, but they will eat milk within a day after birth. If within one day after birth, the child is still poorly fed or does not eat milk, several conditions should be considered: 1. Neonatal subglottic syndrome, which is caused by swallowing amniotic fluid etc. in the mother’s body, usually go to the neonatal unit for gastric lavage treatment, or wait for self-healing. 2. Infection or diseases that cause poor response, especially premature birth, neonatal hypoglycemia, and children with especially low birth weight, can also occur, and need to go to the neonatal unit for treatment. 3. 3. malformations of the oropharynx, such as Pierre-Robin syndrome and swallowing incoordination are common and need to be checked in the neonatal unit for the presence of these conditions.