The penis has two parts—the shaft and the glans. The shaft is the main part of the penis. The glans is the tip of the penis. Babies are born with a covering (foreskin) over the tip of the penis. Some are circumcised. This means that the foreskin is removed. Others are not circumcised and may have skin that covers the tip of the penis. The decision to circumcise a baby may depend on many factors. This includes the parents' preference, religion, and where the child is born.
In an uncircumcised baby, the foreskin will begin to separate from the glans. This is called foreskin retraction. This happens naturally while the child is a baby. Foreskin retraction may happen right after birth. Or it may take several years. Most foreskins can be fully retracted by the time a teen is 18 years old. Retracting or pulling back the foreskin from the tip of the penis should not be forced. If the foreskin is forced to retract, it may cause bleeding and mild pain.