Mastitis is inflammation (swelling) in the breast, which is usually caused by an infection. It most commonly affects women who are breastfeeding, but it can affect other women as well. A clogged milk duct, not fully draining milk from the breast, or breaks in the skin of the nipple can lead to infection.Last Revised: September 20, 2017.
Mar 11, 2019 · Mastitis (inflammation of breast tissue) is a common benign cause of a breast mass. It may be seen in women after childbirth while breastfeeding. It may .
Mastitis most often happens when bacteria enter the breast through the nipple. This can happen when a nursing mother has a cracked or sore nipple. Going for long stretches between nursing or failing to empty the breast completely may also contribute to mastitis.
Most breast abscesses occur as a complication of mastitis, a bacterial infection that causes the breast to become red and inflamed. Mastitis usually affects breastfeeding women, but it can sometimes occur in women who are not breastfeeding.