Generally, nipple invagination in babies is a physiological phenomenon. If a child has an invaginated nipple, parents should not pull it with their hands to avoid local damage to the nipple, which may cause inflammation or even damage to the breast tissue. Therefore, when nipple inversion occurs in children, parents only need to dynamically observe it. The majority of children with nipple invagination will slowly improve as they get older. If a child’s nipples are still sunken in during adolescence, a timely visit to the endocrinology department may be necessary to provide appropriate interventions, but in prepubescent children nipple invagination often does not require treatment.