1. Anatomically, it is a pair of longitudinal skin folds located inside the labia majora, which are small and thin, smooth, hairless and elastic.
 2. The front end of the left and right labia minora is divided into two folds, inner and outer.
 3. The lateral fold is upward, connecting left and right above the clitoral head, surrounding the clitoris, called clitoral foreskin.
 4. The circular groove is the boundary between the clitoral prepuce and the clitoral head.
 5. The medial fold is short and small, and both sides attach to the underside of the clitoral head upward, which is called clitoral frenum.
 6. The posterior end of the labia minora of the nulliparous women is connected to the left and right to form a transverse skin fold, called the labia frenum, which is the posterior boundary of the vaginal vestibule.
 7. The labia minora is divided into internal and external surfaces, with thin, soft skin and rich sebaceous glands.
 8. The outer side is dark blue, which is connected with the inner side of the labia majora.
 9. The inner side is smooth, rich in sebaceous glands, rose colored, similar to mucosa.
 10. There is no subcutaneous fat tissue in the labia minora, which contains a lot of elastic fibers, a small amount of smooth muscle and rich venous plexus.