The size of the baby’s face may be related to poor sleeping posture and congenital tilting of the neck, etc. Clinically, the symptoms can be improved by adjusting the sleeping posture, surgery, and other methods. 1. Sleeping position: Some infants sleep in a unilateral side-lying position for a long time, which may affect the development of the face and form a big and small face. Parents must pay attention to try not to let the child sleep on one side for a long time, and let the child sleep on the left and right sides to improve the baby’s face size. 2. Congenital development: Some babies are born with a sloping neck, and the neck abnormality will affect the development of the baby’s face. Some babies have more severe cases and may need to undergo surgical treatment to correct the abnormal facial development. There may be other clinical options to correct the size of the baby’s face. Consultation with a specialized pediatrician is recommended.