After pregnancy, under the action of estrogen, the nipple and areola will appear coloring phenomenon, that is, on the basis of the original, there will be a darker color, which is a normal physiological phenomenon, clinically do not need to give treatment. This is a normal physiological phenomenon and does not need to be treated clinically. After the end of pregnancy, that is, after delivery, with the decline of estrogen in the body, the phenomenon of darkening of nipples will improve and basically return to the previous appearance. Clinically, you only need to pay attention to breast care, wash the breast locally with warm water every day, and pay attention to the fact that if there are inverted nipples, you must do localized hot compresses and gently pull the nipple, to correct this situation is conducive to breastfeeding for newborns. During pregnancy, you should have regular checkups to see if there are any abnormalities.