How old can babies sleep on pillows, infants within 1 year old head development is the fastest, the growth rate is also the largest, so the shape of the head during this period will be because he sleeps in a different position, the shape of the pillow or the softness is not the same leading to changes in the shape of the head, such as can appear flat head, head to the side of the outward pressure of this abnormal a shape. So in fact, the baby can pillow, but when small, especially within 1 year should be relatively soft pillow, preferably memory foam or memory of special materials made of soft pillows, must be regularly to change his sleeping position, do not let him a position for a long time fixed in this one position may appear to change the shape of the skull. So sleep every day to frequently change his sleeping position, do not pillow too high pillow, relatively small when generally let his head and neck, chest can be on a level line basically can. So the pillow time is not much of a limit, the pillow material and time adjustment to pay attention to avoid him a long time a posture, or every day a posture, and finally lead to changes in the shape of the skull, resulting in the appearance of unattractive, deformed appearance, so be sure to pay attention to adjust the sleeping posture and adjust the pillow material, material.