Inverted nipple

If the nipple of a female breast does not protrude out of the areola plane or even sink under the skin surface, causing a local crater shape, it is said to be a nipple invader (crater nipple), which is a more common type of female breast deformity. Sagging nipples are reported in up to 40% of women. There are two cases of nipple inversion: the nipple is retracted or turned into the breast, and the pull is not higher than the breast skin, which is called true nipple inversion; the nipple develops normally and falls into the areola, and the nipple is in the same plane as the skin, but cannot The erected person, after being pulled out as an ordinary person, said that the inverted nipples were false. True nipple retraction is common on both sides, either primary or inherited; unilateral nipple retraction is less common, usually secondary to breast disease.