Why do breasts feel swollen before menstruation

Patient's question:

Description of Condition: What are the reasons for breast tenderness before menstruation?
History of Treatment and Effect: I always experience breast pain before my period.
Help Needed: What causes breast enlargement before menstruation, much larger than usual. Does breast tenderness always indicate an impending period? Exclude the possibility of pregnancy.

Doctor's answer:

Menstrual breast tenderness is medically known as premenstrual tension syndrome. Its main cause is endocrine disorders, and the breast tenderness is often considered to be caused by hormonal changes in the body before menstruation. Currently, breast diseases have become a common condition among women. Before menstruation, most of the tenderness is mild and bearable. For those with sensitive pain, even slight bumps or vibrations can cause unbearable breast tenderness. If the symptoms are too severe, you may consider starting a low-sodium diet one week before menstruation or taking a small amount of diuretics under the guidance of a doctor to alleviate breast tenderness.

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