Baby always sleep on his back may be habit, digestive diseases. 1. Habit: baby is more accustomed to sleep on the stomach is normal, because everyone will have their own more accustomed, favorite sleeping position. In addition, sleeping on your back is more similar to the baby’s position in the mother’s body, will feel more secure. If it does not cause discomfort, there is no need to worry. 2. Digestive tract diseases: when the baby has abdominal pain, bloating and other abnormal symptoms, sleeping on the stomach can relieve the symptoms. At the same time, parents need to pay attention to observe whether the baby is accompanied by more than crying, irritability, etc., need to judge according to the baby’s mental state, whether the baby is always lying on the ground to sleep for pathological reasons. Non-pathological causes always sleep on their stomachs, no special treatment, parents pay attention to observe the baby, do not have suffocation. Pathological causes, it is recommended to take the baby to the doctor as soon as possible, under the guidance of the doctor targeted treatment.