Five-month-old baby sleep on his back to consider the following reasons: 1, five months baby spleen and stomach weakness, improper diet or cold, can cause gastrointestinal disorders, abdominal discomfort, sleep on his back to relieve abdominal discomfort. If the baby sleeps on his back for a short time, you should pay attention to observe the stool, such as the number of stools, thin, consider indigestion, should be given hot compresses abdomen, clockwise massage abdomen, or oral intestinal probiotics, wake up the spleen to raise children particles, regulate the spleen and stomach and help digestion. 2, sleep on his back is a habit, baby sleep on his back comfortable, a sense of security. Baby in the mother’s tummy is lying down to sleep, after birth still lying down to sleep, belongs to a sense of self-protection. It should be noted that sleeping on your back bedding is easy to cover the mouth and nose, causing breathing difficulties, and even suffocation, not easy to heat dissipation, it is recommended to adjust the posture after sleeping, side or lying down is more conducive to the baby’s physical development.