/kloc-congenital and acquired nipple depression over 0/8 years old. After the breast is fully developed, nipple invagination, and repeated traction fails to attract nipple, nipple invagination correction surgery should be performed. Because many doctors are unmarried girls, we should also consider the problem of unobstructed mammary duct during lactation before operation. Especially for the correction of severe nipple invagination, thorough surgery may often lead to different degrees of damage or adhesion of the milk conveying pipe, which may easily lead to milk retention and acute mastitis during lactation. Therefore, it is suggested to operate cautiously or choose an operation with less damage to the mammary duct. Surgery does not necessarily pursue perfect results, and the nipple is prominent in the later stage, so the baby can suck.