Whether or not you have breast pain in one month of pregnancy varies from person to person, and each person has a different body type and exhibits different symptoms. In the first month of pregnancy, some women may not experience significant breast pain because the fertilized egg has just been laid and estrogen fluctuations are not obvious. However, some women may experience breast pain with morning sickness, vomiting, frequent urination and fatigue, which is usually normal. As the body’s estrogen and progesterone hormones start to increase, they promote the growth of breast glands and alveoli, therefore, some women with sensitive bodies may feel an increase in the size of the whole breast and breast swelling and pain. This can be relieved by using hot towels to warm the breasts, wearing loose underwear, massaging, etc. Be careful not to stimulate the nipples. In addition, if, in addition to chest pain, a pregnant woman finds obvious nodules on her breasts, or if there are changes in the surface skin of the breasts or bloody discharge from the nipples, she should go to the hospital for an ultrasound examination of the breasts to rule out the presence of breast diseases such as breast enlargement, breast nodules, deformed mastitis, and whether they are caused by tuberculosis or congenital diseases, so that they can be treated accordingly as soon as possible.