 [ Symptoms ] my 14 year old niece has a milky discharge coming from her breast what can be the cause for this if not pregnant [ Disease ] this is a great question thanks for asking in general i always suggest women of any age make an appointment with their primary health care provider if they experience nipple discharge of any kind nipple discharge is not necessarily abnormal and does not mean you have breast cancer but because nipple discharge can be caused by a few scary conditions it is usually best to have it checked out by a professional i hope this helps