Baby milk sleep may be harmful to baby’s teeth, sleep quality, growth and development, and in serious cases, choking, or even suffocation, life-threatening. 1. Baby’s teeth: When babies nurse to sleep, it has an adverse effect on dental development. During sleep, milk will accumulate in the baby’s mouth and is likely to cause dental caries. Poor development of milk teeth will have an impact on the growth and development of subsequent permanent teeth. 2. Sleep quality: Breastfed babies usually find it difficult to give up their nighttime milk and continue to nurse at night, because nighttime eating will increase the burden on the baby’s stomach and intestines, thus affecting the baby’s sleep. 3. Growth and development: if the child breastfeeds at night, there will be irregular breastfeeding, which will affect the child’s night sleep, and thus affect the child’s growth and development. 4. Choking: When the baby is nursing at midnight, he is in a half-sleep state, if he is not concentrating when sucking, it will lead to choking. 5. Suffocation: When breastfeeding a child at night, the mother may not wake up and press the child against her neck, causing the child to suffocate. In short, baby milk sleep has a lot of harm, need to cause parents to pay attention to, to develop a good habit of drinking milk to sleep, if the baby milk sleep choking and other serious situations, to timely hospital treatment.