Newborn babies with uncircumcised foreskin are advised to seek prompt medical treatment. Generally babies are born with the head of the penis covered by the foreskin, which is physiological circumcision. If the head of the penis of a newborn baby is not covered by a complete foreskin, it is likely to be a congenital abnormality and should be actively diagnosed and treated. Physiologic prepuce usually occurs in boys at birth due to the natural adhesion between the foreskin and the glans penis. Before the age of 3 to 4 years, as the penis grows, foreskin scum accumulates under the foreskin and gradually separates the foreskin from the head of the penis. After birth, if the glans area is found to be more exposed, the foreskin is missing more, or there is a combination of other genital malformations, there may be abnormal manifestations, such as hypospadias, and so on, which need to be examined in time to avoid interfering with the development of the genitals.