Pregnancy breast pain is related to the following reasons: First, it may be due to the high secretion of hormones in the body during pregnancy, the level of estrogen and progesterone increases, which will make the mammary gland ducts and mammary gland alveoli develop, making the breasts swollen, nipples firm and other causes of chest pain, which is a normal body reaction. Most pregnant women will have obvious pregnancy symptoms in early pregnancy, such as breast swelling and pain, areola color change and other problems, which are normal and do not need to be treated. Secondly, breast pain during pregnancy, there may also be breast disease, such as mastitis, mastopexy and other problems can lead to this situation, but also may be the painful response to external pressure on the breast stimulation. The pain can also be caused by improperly worn bras, so you need to go to the hospital for a timely checkup and do a good job with the related treatment.