You can’t completely prevent lactation: Your breasts typically start to make milk in the first couple of days after you give birth, according to Kaiser Permanente—even if you don’t breastfeed. You may have some leaking and engorgement, which typically gets better over a few days. It usually takes up to several weeks to completely dry up your milk; in the meantime, make sure to take steps at home to decrease discomfort: Wear a bra that fits and provides good support, apply cold packs to your breasts and take OTC medications to reduce pain and swelling.