Nipple discharge refers to any fluid that seeps out of the nipple of the breast.

Nipple discharge during pregnancy and breast-feeding is normal. Nipple discharge happens less commonly in women who aren't pregnant or breast-feeding. It may not be cause for concern, but it's wise to have it evaluated by a doctor to be sure. Men who experience nipple discharge under any circumstances should be evaluated.

One or both breasts may produce a nipple discharge, either spontaneously or when you squeeze your nipples or breasts. Nipple discharge may look milky, clear, yellow, green, brown or bloody. Discharge that isn't milk comes out of your nipple through the same ducts that carry milk. The discharge can involve a single duct or multiple ducts. The consistency of nipple discharge can vary — it may be thick and sticky or thin and watery.

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Dec. 03, 2019