Your breasts will have normal changes right after delivery. For example, they will begin to fill with milk between the third and fourth days after delivery. If you are breast-feeding, your breasts may be sore as they fill with milk and may become painful and swollen (breast engorgement). Breast-feeding often will help reduce engorgement. Place ice packs on your breasts for the pain and swelling. Be sure to put a cloth between your skin and the ice pack. Some women find a hot shower or warm towels on the breasts help the pain.

During the first days of breast-feeding, your nipples may become tender or sore. This soreness usually goes away as your baby breast-feeds regularly. Make sure that your baby is latching onto your breast properly. This helps prevent problems such as sore nipples, blocked milk ducts, breast infections (mastitis), and poor weight gain for your baby.

If you are not breast-feeding, do not stimulate your nipples or warm your breasts. Instead, apply cold packs, use medicine for pain and inflammation, and wear a supportive bra that fits well.