Enlargement of the labia minora in girls may be due to normal growth and development, or it may be due to endocrine disorders, developmental abnormalities and other pathological reasons. 1. Normal growth and development: during puberty, the labia minora will gradually appear higher than the labia majora, thus protecting the vaginal and urethral orifices and reducing the chances of friction and infection, which is a normal growth and development process. 2. Endocrine disorders: If a girl’s labia minora are enlarged before the age of five and are significantly higher than the labia majora, it may be due to endocrine disorders caused by premature development, which needs timely treatment. 3. Developmental abnormalities: If the labia minora of small children are obviously enlarged, it may be congenital malformation, developmental abnormalities, and should be treated promptly. If the labia minora of girls before the age of five is obviously enlarged or abnormal development, should go to the hospital in time, under the guidance of the doctor for treatment.