There is usually some difference in the vulva of girls between 12 and 18 years of age, mainly in morphology.
The vulva of a 12-year-old girl is usually in the developmental stage. The vulva is usually pink in color, and the structures of the mons veneris, labia majora, and labia minora do not protrude, which makes it a childish type of vulva. The subcutaneous fat of the labia majora and minora is thin, the labia minora slightly protrude from the skin, and the labia minora are weak.
The vulva of an 18-year-old girl changes from the infantile type to the adult type. The mons veneris is elevated, and the labia majora and minora become hypertrophied and hyperpigmented.
Usually should pay attention to vulvar hygiene, such as vulva color, morphology on the obvious changes should be suspected of gynecological diseases, recommended timely medical treatment.