Overflowing breasts during non-lactating periods may be related to a disruption of hormone levels in the patient’s body. Generally, when estrogen and progesterone levels are elevated, the mammary glands and ducts may produce small amounts of milk. It is a normal phenomenon that the milk is eliminated from the body through the milk ducts and nipples. When the hormone levels return to normal, the symptoms can usually be relieved. It may also be related to hyperplasia of the breast. When hyperplasia of the breast occurs, there may be cystic hyperplasia of the alveoli and lobules of the breast. The secretion of milk under the action of hormones is usually accompanied by periodic pain in the bilateral breast and can be examined in the hospital. If the lesion is considered to be caused by breast hyperplasia, oral medication is usually required, such as prolotherapy pills, red gold anti-knot capsules and so on. It is also possible to consider a lesion in the breast, such as a papillary tumor or papillary carcinoma in the breast ducts, which may result in nipple overflow. The color is usually plasma or milky white or may be bloody, and there may be a hard lump under the areola, usually about 1cm in diameter, which requires further examination at the hospital.