What is the cause of chest pain before aunt

Chest pain is normal before the onset of menstruation. During the menstrual cycle, changes in sex hormones in the body show signs of hyperplasia to recovery. 7 to 10 days before menstruation, due to increased androgen and progesterone concentrations, antidiuretic hormone hyperactivity, increased aldosterone secretion, expansion of the mammary ducts, hyperplasia of epithelial cells, edema of the matrix around the mammary ducts, resulting in compression symptoms, resulting in hyperplasia of the mammary glands, so women will feel breast pain. The recovery is the reduction of hormone levels in the body after menstruation, the reduction of breast volume, and the feeling of breast pain disappears. Therefore, it shows premenstrual breast pain, which is a relatively common phenomenon. After most of the menstruation, this symptom will be reduced or disappeared.