Inverted nipples do not usually recover on their own and need to be treated promptly, otherwise they can cause a collection of local dirt secondary to infection. Nipple invagination is a condition in which the nipple does not protrude from the skin at all or partially from the skin in the normal nipple-areola area. Nipple invagination can usually be divided into two causes, including congenital factors and acquired factors, which cannot recover on their own. Congenital factors causing nipple invagination are commonly associated with congenital breast dysplasia. Acquired factors are usually secondary to benign or malignant lesions of the breast, such as non-lactating mastitis and breast cancer, which can cause contracture or pulling of the nipple due to the lesions affecting or invading the tissue below the nipple. Patients with nipple invagination should visit a regular hospital for breast surgery and, if necessary, a nipple aspiration biopsy to determine the cause and decide on a treatment plan after a thorough evaluation by a specialist.