Nipples can be squeezed out white and cyanotic fluid may be non-lactating mastitis, ductal papilloma, breast cancer and other diseases. 1. Non-lactating mastitis: Patients with non-lactating mastitis may have symptoms such as breast lumps and inverted nipples, nipple discharge, and breast pain, which may be related to autoimmune factors, bacterial infections, breast trauma, and medication stimulation, and patients may experience symptoms such as white and greenish fluid coming out of the nipple. 2. Intraductal papilloma: Intraductal papilloma is a kind of mammary epithelial tumor occurring in breast ducts, the cause of which is not yet clear, pregnancy, drugs or food may promote the production of tumors, the typical symptom of which is nipple overflow, so the symptom that patients can squeeze white and green liquid out of nipples may be caused by intraductal papilloma. 3. Breast cancer: the cause of breast cancer is related to heredity, over nutrition, excessive alcohol consumption and other factors. Patients may have symptoms such as nipple discharge, breast skin abnormalities, etc. Some patients’ lotion manifests as white, green, blood, and so on. Causes of nipple can be squeezed out white and greenish liquid there are other reasons such as breast hyperplasia, patients are advised to go to the hospital in time, to clarify the cause of the disease.