Breasts are swollen before menstruation due to changes in hormone levels in the body or changes in lifestyle habits. When there is swelling and pain in the breasts, it is important to check yourself to see if there are any hard lumps in the breasts. If there is no hard lump, there will be a physiological swelling and pain, can be 45 ℃ warm water for wet hot compresses or massage, 15 minutes / times, 2 times / day, can be relieved. At the same time when the self-examination, chest lumps, or nodular hyperplasia. At this time, you need to go to the hospital registered breast department, breast ultrasound examination, according to the situation of oral medication for treatment. After treatment, it is important to have a review and examination to avoid affecting the development of the breasts as well as the health of the body.