There are few nipple indentations due to dysplasia, and although there are no statistics on the incidence, according to the probability of outpatient observation, about 10% of women have varying degrees of nipple dysplasia. Nipple depression due to dysplasia is a condition in which the nipple does not normally protrude from the skin surface, but is depressed below the skin plane and can be pulled out in most cases. The causes include lack of nipple support structures, short nipple milk ducts, and a large number of fibrous cords contracting and pulling around the milk ducts. Nipple indentation is usually asymptomatic and only affects aesthetics, so it is not taken seriously. In fact, nipple indentation can bring about diseases and greater adverse effects. This is the most frequent and least appreciated reason by doctors and patients, as sunken nipples are difficult to clean and the surface duct openings are often blocked, causing secretions from the ductal system of the blocked ducts to leak out of the ducts and stimulate the breast tissue, causing mastopexy, plasma cell mastitis or other pathologies that are difficult to heal over time. During breastfeeding, sunken nipples prevent the baby from sucking on the nipple, or the milk cannot be discharged due to blockage of the ducts, and the accumulation of milk often leads to severe septic mastitis. A significant proportion of sunken nipples cannot protrude from the surface of the breast even during breastfeeding, making it impossible to breastfeed. Affects sexual life A large number of nerve endings are distributed on the nipple surface, which is a sensitive stimulation site during sexual life and participates in the process of sexual life, and nipple indentation has different degrees of adverse effects on sexual life. Nipple indentations can be trained to help them develop and mature in mild cases, and surgical correction is required in severe cases. The important thing is that it is difficult for the patients themselves to make a correct judgment on how to deal with it, and they need to consult a specialist to determine the degree and type of nipple indentation after examination before they can make the correct treatment.