Nipple discharge with an odor

Patient's question:

For a long time, there has been single nipple discharge with a meaning, and there is a sense of pain when pressed. Please ask the expert what is going on

Doctor's answer:

Analysis of the condition: Diseases that can cause nipple discharge include extramammary diseases and intramammary diseases. Extramammary diseases are primarily caused by hypothalamic-pituitary lesions, such as tumors, leading to hyperprolactinemia. Nipple discharge caused by extramammary diseases often manifests as bilateral, multi-duct, non-hemorrhagic leakage. In contrast, intramammary diseases mainly include intraductal papilloma, duct ectasia, proliferative changes, breast cancer, and inflammatory lesions.
Advice: It is recommended to undergo a thorough examination at the hospital, such as nipple discharge smear, fasting blood test for prolactin, or even mammography, to identify the underlying cause and provide symptomatic treatment.