It is a normal physiological phenomenon that women who do not experience breast swelling and pain after pregnancy do not necessarily experience breast swelling and pain after pregnancy. After pregnancy, women are prone to a certain degree of secondary breast development due to changes in hormone levels in the body, especially elevated lactogen in the body, and some will experience a certain degree of breast tenderness, but the appearance of breast tenderness is related to changes in hormone levels in each person and the body’s sensitivity to hormones. Whether or not breast tenderness occurs after pregnancy varies from person to person. It is not possible to judge whether a woman’s symptoms are normal after pregnancy by whether she has breast tenderness or not, but it is a normal phenomenon, as long as the pregnancy test is done regularly and the fetus develops normally.