Why white stuff comes out of your nipples?

White discharge from the nipples can occur for several reasons, including hormonal changes, especially during pregnancy or breastfeeding, or conditions like galactorrhea, which is often linked to elevated levels of the hormone prolactin. It may also result from certain medications or underlying medical issues, such as infections or tumors. If the discharge is persistent, unusual, or accompanied by other symptoms, it’s advisable to consult a healthcare professional for evaluation.