When breast pain occurs before and during menstruation, it is usually considered to be a breast disease, the most common cause of which is mastopexy. Mammary gland hyperplasia is a relatively common disease, mainly due to blockage of the milk ducts. When you have your period, the change in hormone levels can lead to severe enlargement of the milk ducts. Usually this swelling and pain is relieved naturally after the menstruation clears. Women’s breast is also the most susceptible part of the body. It is recommended to have an annual breast examination, including ultrasound palpation of the breast, and if mammary gland hyperplasia or breast fibroids are found, they should be treated actively. Mammary gland hyperplasia can be treated with medication, and you should not wear too tight underwear to avoid affecting the blood circulation of the breast.