Early pregnancy and menstrual periods can cause women to have chest pain due to hormonal changes, but there are differences in the duration and changes in the appearance of the breasts during early pregnancy chest swelling and regular periods. The difference in the causes and performance of chest pain 1, early pregnancy chest pain: pregnant women will experience breast pain due to changes in hormone levels, and this pain may continue throughout early pregnancy, the volume of the breast will gradually increase, there are obvious veins showing, nipple enlargement, nipple areola coloring deepened, this is a normal phenomenon, if there is no chest lumps, itching and other abnormalities do not need special treatment; 2, vacation chest pain: vacation Chest pain occurs about 1 week before menstruation and disappears after the menstrual cycle. In addition to swelling, it can also be manifested as tingling or accompanied by lower abdominal cramps, which do not require special treatment. Precautions 1, women during menstruation and pregnancy is recommended to avoid eating cold, spicy, stimulating food, pay attention to warmth; 2, women should wear appropriate underwear to avoid improper size selection on the breasts caused by direct extrusion, causing swelling and pain; 3, regular breast examination, found to have lumps or abnormal swelling and pain to seek medical attention, clear causes, early treatment.