Generally, after seven weeks of pregnancy, patients will begin to experience breast tenderness and pain. At this time, patients will feel that their breasts are noticeably swollen and increase in size gradually. The nipples will start to darken and enlarge. Around the areola, sebaceous glands will appear, and deep brown nodules known as Montgomery's tubercles will also develop. The color of the areola will begin to darken, which is related to the significant increase in hormones, particularly estrogen and progesterone, in the body after pregnancy. It is recommended that women protect their breasts from being compressed and avoid excessive massaging after pregnancy.