Nipple discharge is worrying as it may be associated with cancer. The majority of people with a nipple discharge do not have cancer especially if they are young, the discharge is not bloody or if it comes from more than one duct.
The breast is made up of several lobes. Each lobe has a duct that drains it. The ducts go towards the nipple. There are 5-10 major ducts that surface on the nipple. The discharge may be from one or more than one.