It is also normal for breasts to stop hurting on the 45th day of pregnancy, as long as there is no vaginal bleeding or abdominal pain. Breast swelling and pain is mainly because after pregnancy, the body’s progesterone and estrogen secretion increases, stimulating the mammary gland follicles to develop again. And some women also experience early pregnancy symptoms such as vomiting, nausea, loss of appetite and aversion to grease. In most women, the symptoms gradually disappear around the third trimester as the pregnancy progresses. However, these symptoms may vary from woman to woman, and not all pregnant women will experience these symptoms, and the symptoms may disappear earlier or later. If the swelling and pain in the breasts disappears, there is usually no need to worry too much. If there are other inappropriate symptoms, it is recommended that you consult a doctor and undergo the relevant examinations as prescribed by the doctor, so that the cause of the problem can be clarified with the help of the doctor and targeted treatment can be carried out.