Enlargement of the labia during childhood development is usually normal and is related to maternal estrogen levels and genetics. If the mother’s estrogen level is relatively high, after the birth of the child, the high estrogen may also affect the child, so that the child also carries a higher level of estrogen, and the phenomenon of labia hypertrophy will occur. Generally, as the child grows and develops, the hormone level will gradually decrease and the labia hypertrophy will gradually recover. If the development of enlarged labia in children is accompanied by other symptoms such as swelling and pain, it is necessary to consider whether it is caused by a bacterial infection, and it is recommended to consult a doctor in a timely manner and choose the appropriate way of treatment.