Babies sleeping on their stomachs may be related to habits, psychological factors, indigestion and so on. 1. Habits: every baby has its own sleeping habits, some babies will like to sleep on their stomachs. If there is no discomfort symptoms. 2. Psychological factors: in the baby’s age, sometimes the feeling of insecurity, lying down to sleep similar to the position in the womb, will bring the baby a sense of security. 3. indigestion: in the growth and development of the baby’s digestive function is not fully developed, prone to indigestion, the baby sleeps on his back to ease the discomfort of indigestion. When the baby sleeps on his back and physical discomfort, parents should take the baby to the doctor in a timely manner, under the guidance of a professional pediatrician for targeted treatment.