Babies like to sleep on their backs for several reasons: 1, may have a relationship with the sense of security. As the baby was not born before, in the amniotic fluid position are back facing outward, the body curled up, so the baby is more like to sleep on his back after birth. This sleep position will let the baby sleep more mature, not easy to wake up, more secure; 2, may have a relationship with the accumulation of stagnation. If the baby accumulation of food, can be due to bloating like to sleep on their stomachs, can help relieve gastrointestinal discomfort; 3, with the spleen and stomach deficiency cold. If the baby’s spleen and stomach cold, also like to sleep on their stomachs, because sleeping on their stomachs can make the baby’s abdomen feel warm. Babies like to sleep on their stomachs, but in many cases is normal, or due to stagnation, spleen and stomach deficiency cold caused. Parents are advised to take their babies to the children’s hospital for examination in time for early diagnosis and treatment.