During the menstrual cycle, various hormones cause changes in breast tissue that can lead to pain or discomfort in some women. While breasts do not typically .
Fluctuating hormone levels account for most episodes of premenstrual breast swelling and tenderness. Your hormones rise and fall during a normal menstrual .
Most breast pain seems to relate to the levels of two hormones -- estrogen and progesterone -- in your body. Doctors aren't sure.