Why do your nipples have white stufF coming out of them?

White discharge from the nipples can be caused by several factors, including hormonal changes, infections, or benign conditions like galactorrhea, which is the production of milk not related to childbirth or nursing. It can also result from ductal ectasia or a blockage in the milk ducts. If the discharge is persistent, accompanied by pain, or has a foul odor, it's important to consult a healthcare professional for proper evaluation and diagnosis.