The third day after ovulation is due to a significant increase in the level of estrogen and progesterone, which promotes the development of mammary gland ducts and follicles, and the appearance of breast enlargement causes breast pain, which is usually alleviated or disappeared after the onset of menstruation. If emotional depression and mental stress can also lead to the appearance of breast pain, consider the pain caused by breast hyperplasia, breast fibroids, malignant tumors, the appearance of breast pain, you should go to the hospital for breast ultrasound, if the ultrasound scores are not satisfactory, you need to carry out a closer examination. If there are nodules, they can be treated with Chinese patent medicines or Chinese herbal soup that disperses knots and regulates qi. Breast fibroid can be surgically removed if necessary, and the swelling and pain can be relieved by localized hot compresses on the breasts. Normally, you should regulate your emotions, avoid depression, maintain a cheerful and optimistic mindset, ensure regular work and rest time, and don’t stay up late.