We know that 1-3 months old baby’s skull is relatively soft, if you do not pay attention to the sleeping position, it is easy to affect the head and facial development, from then on there is no relationship with the perfect head shape. Therefore, mommy should change the sleeping position for baby every 2 to 3 hours, preferably alternating between flat and side-lying, to ensure that baby’s head develops normally and sleeps with a beautiful head shape.