The first thing to do is to identify the cause of the baby’s big and small face, which may be due to intrauterine pressure, extrusion of the birth canal, habitual sleeping on one side, or congenital asymmetry of the skull, etc., which should be handled according to the cause. If the baby’s face is caused by intrauterine pressure, birth canal extrusion, habitual sleeping on one side, etc., you can generally sleep on the side of the face that is bigger, or lie down flat to sleep. Let the small side of the face grow slowly, or can change the size of the face. Parents can also let the baby awake lying down to play, so that the head and face muscles, bones to the direction of balanced development. At the same time, pay attention to vitamin D supplementation, more sun exposure, and observe whether the infant’s large or small face can be improved. Infants should change their sleeping position more often and avoid keeping a certain position for a long time. If the baby’s face is very obvious, it is necessary to go to the hospital in time to find out what causes it, so as to target treatment.