Jie is a supermarket sales clerk, the child is 9 years old, but the two breasts still secrete milk, when having sex with the husband hard love support, the flow of more. Half a month ago, she found a white rice-like discharge on her nipples, which was squeezed out and then produced again. Menstruation is also normal, Jie came to the breast clinic with doubts. Nipple overflow is a common symptom of breast disease. Women’s milk secretion during the non-lactation period is called overflow, and it may occur in unmarried women and women who have given birth after marriage. It is manifested as a natural small amount of bilateral nipple overflow or squeeze out, creamy white or pure clear without blood, but also is manifested as unilateral nipple, independent of the size of the breast. The cause of overflow is due to excessive secretion of prolactin in the body. The causes of hyperprolactin are complex and include two categories: physiological and pathological. It can be a systemic cause or a local cause. First of all, after the birth of a child, several consecutive abortions, resulting in increased levels of prolactin in the body; due to poor sleep, long-term use of sedatives, sleeping pills; tuberculosis or intestinal tuberculosis in the treatment of long-term use of anti-TB drugs; after marriage, women need to take oral contraceptives for a long time due to discomfort with the ring; in addition to hyperpituitary function, pituitary microadenoma, hypothalamic disorders and taking antihypertensive drugs. Physiologically, it is mostly due to strong sexual excitement, resulting in a temporary increase in prolactin, which will soon return to normal. If a non-pregnant woman is said to have lactation accompanied by amenorrhea, it is called amenorrheic lactation syndrome and can lead to infertility. Ductal dilatation of the breast will also result in a small amount of milk-like discharge. Some women with breast enlargement will have overflowing milk accompanied by breast swelling and pain, which may be due to endocrine disorders. If the overflow is bloody or completely bloody, you should be alert to the possibility of breast cancer. In conclusion, women with breast overflow should not be careless and do not need to panic. They should go to hospital for detailed examination, such as smear of overflow, fasting blood test for prolactin, or even mammogram, in order to clarify the cause and treat the disease.