Is breast pain one week before menstruation normal?

Patient's question:

Hello! I am 19 years old. Since around 2005, my breasts have been painful once a month, mostly in the upper part. The pain occurs when I press them but not when I don't. It also hurts when I go downstairs or run. I've consulted about this and been told it's related to my period, but I calculated it, and it's still about a week away. It almost always starts earlier. The pain lasts for about half a month, and it stops when my period ends. But then, after a week, the pain starts again. Is this a sign of something?
First follow-up question: It doesn't seem to be a major problem.

Doctor's answer:

Women experience breast fullness, hardness, and tenderness before menstruation; in severe cases, even slight vibrations or collisions can cause discomfort. This is due to the increase in estrogen levels before menstruation, leading to breast hyperplasia and edema in the breast tissue. After menstruation, these changes usually disappear, which is a normal physiological phenomenon. You don’t need to worry too much.
The occurrence of milk retention cysts not only affects women’s physical health but can also lead to gynecological diseases. Therefore, it is best to undergo an ultrasound examination at the gynecology department of a hospital to identify the cause and receive targeted treatment. Additionally, pay attention to personal hygiene and maintain cleanliness in the perineal area.

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