Since estrogen reaches its highest level during ovulation, hormonal stimulation may cause physiological breast swelling and pain, and may also lead to the appearance of obvious egg-white-like stretched leucorrhea. Therefore, when women experience breast pain during ovulation, the first thing to consider is that it is caused by physiological hormonal stimulation, and often the pain will not be particularly obvious as the breasts are mainly swollen, and the symptoms of breast pain will be relieved naturally after ovulation. However, there are some women who have breast swelling during ovulation and also have obvious pain, which is mainly painful. The reason for breast swelling during ovulation in these women is mainly due to local organic breast disease and estrogen stimulation, which causes obvious breast swelling. The most common reason is that women with breast hyperplasia have chest swelling and pain in both breasts, and usually need to go to the hospital for gynecological or breast surgery examination and breast ultrasound to confirm the diagnosis, and after ovulation, this chest swelling and pain will not naturally ease, but will continue until the onset of menstruation. Therefore, when women experience this kind of breast swelling and pain, it is best to go to the hospital, check to confirm the specific cause, and then consider whether to use medication.