Baby can rest on the pillow, provided that the baby is more than three months old. Because the baby's head, neck and shoulder back are at the same level within three months, there is no need to pillow. Three months later, the physiological curvature of the baby's spine gradually forms. At this time, giving the baby a pillow helps to improve the comfort. At the same time, when the baby sleeps, it helps to keep the respiratory tract smooth and improve the sleep quality. The pillow also helps the baby sleep head shape, prevents head deviation, and is beneficial to the baby's growth and development.