In the first six weeks of pregnancy, there will be breast swelling and pain because the estrogen and progesterone in the body will grow rapidly, stimulating the blood vessels in the breasts and making them feel swollen and painful. At the same time, after pregnancy, the breasts will keep growing for the second time, and the swelling and pain caused by the growth period will also exist, which is a normal physiological phenomenon. The pain can be relieved by massage or hot compresses, which generally do not affect the health of the body. However, as far as possible, do not stimulate the nipples during massage or hot compresses, because the nipples can cause uterine contractions, resulting in persistent bleeding or abdominal pain, which must be taken into account at this time. Also in the early stages of pregnancy, you must go to the hospital for an ultrasound to determine if the fetus is in a stable stage. In early pregnancy, some women may have a low level of progesterone and HCG, which may lead to preterm miscarriage.