Breast swelling and pain in early pregnancy is a normal maternal change in early pregnancy, and the discomfort of breast swelling and pain will be gradually relieved as the pregnancy week gradually increases. After pregnancy, the breasts start to increase in size and become engorged with blood due to the large amount of estrogen secreted by the placenta (which stimulates the development of breast ducts) and progesterone (which stimulates the development of breast alveoli). Self-perceived breast swelling is a common sign of early pregnancy. The nipples become darker and more erect, the surrounding areola darkens, and the peripheral sebaceous glands hypertrophy to form scattered nodular elevations called Montgomery’s nodes. Breast tenderness in early pregnancy usually does not require special treatment, and hot compresses can be applied if necessary. It should be noted that if the breast pain is getting heavier and heavier, or if the pain is not reduced even after the early stage of pregnancy, it does not exclude the pathological condition of breast, such as breast fibroid hyperplasia, breast cancer, etc. You can perform bilateral breast palpation at home by yourself: divide the breast into four quadrants: inner and outer, upper and lower, and touch the right hand with four fingers together from the outer upper quadrant of the left breast in the counterclockwise direction; similarly, check the right breast with the left hand, and touch it from the outer upper quadrant in the clockwise direction to check If necessary, ultrasound examination of both breasts is feasible.