Breast swelling and pain a few days before menstruation is because of the hormone level changes in the body before menstruation, before menstruation the value of the body’s progesterone decreases, which can easily lead to breast congestion, swelling and pain, which is a normal physiological phenomenon, and generally do not need to be treated. If the breast swelling and pain is more obvious, you can also under the guidance of the doctor to take drugs such as free pills, to help qi and blood run, improve the symptoms, usually after the period, the phenomenon of breast swelling and pain will disappear naturally. Breast swelling and pain, should be symmetrical, if only one side of the breast swelling and pain, you need to be alert to whether the breast itself disease, you can see the doctor to do breast ultrasound, in order to have early detection of disease, to rule out breast hyperplasia, breast fibroids and other diseases.