Areola, like nipple, is only a small part of breast tissue, but it has its unique and irreplaceable physiological function. The outlet of mammary duct is mostly concentrated in nipple tissue, but there are still a few openings of mammary duct on areola, which is deeper than other skin pigmentation.

1. Pregnancy: Hormone changes cause areola to enlarge and turn black at the same time. Even if the postpartum hormones gradually return to normal, the areola size can not be restored to the pre-pregnancy appearance.

2, basking in the sun: wear a bikini without sunscreen effect, the fabric is more transparent after launching, so that the sun has a chance to invade the chest. Or like to wear thin and cute clothes, without underwear and sun protection, it will lead to the black areola.

3, excessive stimulation: excessive sexual life, baby sucking breast milk, and like to wipe the body with a sponge brush, improper exfoliation and so on. , will cause melanin precipitation.

4, wear rough underwear: rough underwear material, constantly rubbing areola, will also cause melanin precipitation.