If a small amount of milky white liquid is squeezed out of one breast alone, it is considered a normal breast secretion, the mammary gland has a secretory function, there will be a small amount of secretion from the nipple out of the body, especially after the end of breastfeeding, a small amount of milky white liquid squeezed out of the nipple, no other uncomfortable symptoms, is a normal phenomenon do not need to worry, usually do a good job of local cleanliness and hygiene can be. If there is often a large amount of milky white liquid overflow, accompanied by pain and discomfort in the breast, you should also consider the increase in secretion caused by inflammation of the breast, which is caused by the invasion of bacteria along the breast duct infection, you need to do a breast ductoscopy to determine the specific cause of the disease, and if necessary, you can do lavage treatment of the breast duct. The secretion of breast milk is influenced by the level of hormones in the body, excluding the secretion of breast milk during lactation, you also need to determine whether there is a hormonal disorder, try to go to the regular hospital mammography department and check to confirm the diagnosis.