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Published on: 7/15/2026
Nipple discharge is fluid leaking from one or both nipples. It can be clear, milky, yellow, green, brown, or bloody. Common causes include hormonal changes, pregnancy, breastfeeding, certain medications, infections, benign breast conditions, or, less commonly, breast cancer. While nipple discharge is often harmless, it should always be evaluated by a healthcare provider to rule out serious conditions.
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Reviewed for medical accuracy: 07/15/2026
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Submit your own QuestionNipple discharge can happen for different reasons, and not all of them are serious. It can be caused by hormonal changes, infections, or even certain medications. Sometimes, it might just be a normal body change. But, it is important to be careful, because in some cases, it can be a sign of a more serious issue, like a growth or cancer.
Here are some common causes of nipple discharge:
If you notice nipple discharge, it is a good idea to talk to a doctor. You can start by using a free symptom checker to better understand your symptoms and whether you should seek medical care. They can help figure out what is causing it and if there is anything to worry about. Remember, it is always better to be safe and have it checked.
(References)
Leis HP Jr. (1989). Management of nipple discharge. World journal of surgery, 2696228.
Hussain AN, Policarpio C, & Vincent MT. (2006). Evaluating nipple discharge. Obstetrical & gynecological survey, 16551379.
Zervoudis S, Iatrakis G, Economides P, Polyzos D, & Navrozoglou I. (2010). Nipple discharge screening. Women's health (London, England), 20050819.
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