Estrogen causes the breast ducts to enlarge. Progesterone production causes the milk glands to swell. Both of these events can cause your breasts to feel sore. Estrogen peaks in the middle of the cycle, while progesterone levels rise during the week before menstruation.
Besides, can you get sore breasts 2 weeks before your period?
Breast pain. Pregnancy: Your breasts during early pregnancy may feel sore, sensitive, or tender to the touch. They may also feel fuller and heavier. This tenderness and swelling will usually happen one to two weeks after you conceive, and it can last for a while as your progesterone levels rise due to your pregnancy.
Why do my breasts hurt when I am on my period?
Lots of girls get aching in their breasts before their periods start. The aches are caused by a decrease in the hormones estrogen and progesterone, which are responsible for a girl's menstrual cycle. Some women continue to get aches in their breasts for as long as they have their periods, which is completely normal.