Is it good for children to sleep without a pillow—different stages have different standards

For the mentality of doting on children nowadays, only you who have become a mother can understand. And their indulgence is reflected in every detail. They are afraid that their children's head shape will not look good when they grow up, so they don't let their children use pillows during infancy. But when the child is 5 or 6 years old and sleeps alone in a room, whether or not they use a pillow is really beyond control. So, is it good for children not to use a pillow when sleeping?