The darkening of breasts after pregnancy can be reversed. Women will experience different degrees of breast darkening after pregnancy, which is mainly related to the elevated level of estrogen in the body during pregnancy. After delivery, the estrogen level in a woman’s body gradually returns to normal, and the melanin pigmentation will be alleviated. The color of a woman’s skin can gradually improve. After pregnancy, women’s breasts will undergo a series of changes under the influence of estrogen. The first major manifestation is pigmentation of the areola and nipple. Secondly, it can be manifested as an increase in the volume of the breasts. Under normal circumstances, the breasts will gradually return to their normal shape after delivery.