Choking usually disappears gradually between 3 and 6 months of age. The main cause of choking is an underdeveloped esophagus. Milk flows from the esophagus back into the throat, leading to choking. After 3 to 6 months of life, the infant’s digestive system gradually improves, the cardia is relatively well developed and the heart functions relatively well. With proper feeding, babies will not be so prone to choking. During the baby’s 3-month period, parents should not feed the baby when the baby cries or laughs, or wait until the baby is hungry, which is prone to choking. In addition, babies may also choke because the mother’s breastfeeding position is not correct. Breastfed babies should be reclined in the mother’s arms, not lying on the bed to feed. Choking is a manifestation of self-protection of infants, but it should be noted that choking can easily lead to infant suffocation.