Breasts can squeeze out water may be caused by pregnancy, breast enlargement, endocrine disorders and other reasons. 1. Pregnancy: It is more common during pregnancy, especially in late pregnancy, because the breasts are affected by prolactin and progesterone to prepare for breastfeeding after delivery. 2. Breast enlargement: hard lumps and pain in the breasts, and milky white color and clearer water extruded from the breasts. If you are not pregnant, consider that you are suffering from breast enlargement. 3. Endocrine disorders: certain endocrine diseases can cause a pathological increase in prolactin, which can cause lactation. Watery nipples, clear or yellowish color may be caused by thyroid hormone disorders due to thyroid diseases. At the same time, watery nipple, yellow color, more turbid may be caused by ductal dilatation with chronic ductal inflammation, such as patients taking gastrointestinal tract power drugs or anti-anxiety drugs, can also be caused by increased prolactin so that the nipple is watery. Breast cancer, breast ductal tumor, mastitis, etc. are all pitted with watery nipples. It depends on the specific situation. It is recommended to go to the hospital to improve the relevant examination, after clarifying the cause of the disease, under the guidance of the physician reasonable use of drugs.