Milky white water from breasts during menopause is usually caused by milky white overflow due to elevated prolactin, and it may also be triggered by diseases such as dilated milk ducts, cystic hyperplasia of the breast, pituitary gland lesions or malignant tumors of the breast. 1. Dilatation of milk ducts: this disease is most common in women over 40 years old who are not breastfeeding or menopausal, mostly caused by hormone disorders and elevated prolactin, and the most important symptom is nipple discharge, which can be the only symptom. 2. Cystic hyperplasia of the breast: the lesion of cystic hyperplasia of the breast is connected with the ducts, which will lead to overflow and exudation, and the nipple overflow can be milky white, straw-yellow, brown, bloody, etc., which is more common in middle-aged women around 40 years old. 3. Pituitary lesions: Pituitary lesions such as pituitary microadenomas will lead to increased secretion of prolactin, inducing hyperprolactinemia, thus nipple discharge. 4. Malignant tumors: if the nipple of menopausal women appear overflow, they should be alert to the occurrence of breast cancer, such as intraductal carcinoma, intraductal papilloma or carcinoma, etc., which will lead to overflow exudation by violating the ducts. There may be other reasons for milky water coming out of breasts during menopause, it is suggested that one should go to the hospital in time to find out the reasons, and treat for the causes under the guidance of doctors.