One or both breasts may produce a nipple discharge, either spontaneously or when you squeeze your nipples or breasts. A nipple
discharge may look milky, or it may be
yellow, green, brown or bloody. Nonmilk discharge comes out of your breasts through the same nipple openings that carry milk. The consistency of nipple discharge varies from thick and sticky to thin and watery.
Sometimes, nipple discharge is a normal part of your breast's function.