Baby pouting to sleep, may be a normal phenomenon, may also be due to gastrointestinal discomfort and so on. 1. Normal phenomenon: due to the baby in the mother’s womb, may be in a pouting position, developed a habit, more secure, so after birth for some time, may not be able to improve, often pouting to sleep, this situation will be with the baby’s age, and gradually improve, do not need to worry about it. 2. gastrointestinal discomfort: if the baby gastrointestinal discomfort, may be pouting through the buttocks to sleep, relieve discomfort. Because of the baby’s age, gastrointestinal development may not be perfect, prone to indigestion, flatulence, etc., through the pouting buttocks, can be a better relief of intestinal flatulence, reduce the discomfort. Baby pouting to sleep, there may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.