After pregnancy, the nipples and areola of the patient will show the following changes: the color of the patient’s areola will deepen and gradually change from pink to brown, the patient’s areola will also gradually increase in size, and the nipple will be thick and easy to be erected. However, after pregnancy, such changes in nipples and areola appear gradually with the increase of pregnancy months, and these changes do not appear at the beginning of pregnancy. Therefore, it is normal for the nipples and areolas to remain unchanged at the beginning of the patient’s pregnancy, and it is only after the second month of pregnancy, when the patient’s estrogen and progesterone levels rise more significantly, that the patient’s nipples and areolas will show significant changes. Especially at the end of pregnancy, when the patient is about to give birth, the patient’s areola will appear obvious color deepening, dark brown.