The probability of self-correction of nipple indentation is relatively small. In mild cases of indentation, there may be some relief; in severe cases, self-correction is generally not possible. Nipple inversion is usually congenital and occurs because the bend of the milk ducts is not straight, pulling the nipple inward. Further examination is needed to confirm the diagnosis and treatment according to the degree of nipple inversion. Depending on the depth of nipple inversion, it can be categorized into three degrees: The first degree is partial nipple inversion, the nipple neck exists, can be easily extruded, the size of the nipple after extrusion is similar to normal; the second degree is the nipple is completely sunken in the areola, but the nipple can be extruded by hand, the nipple is smaller than normal, most of the time there is no nipple neck; the third degree is that the nipple is completely buried underneath the areola, and it is not possible to extrude the sunken nipple, and it is necessary to carry out surgical operation and traction treatment. For young women with inverted nipple, it not only affects the aesthetics, but also affects the future breastfeeding, it is recommended to carry out corrective surgical treatment for inverted nipple in time.