Breast infection

Alternative names:

breast abscess; infection of breast tissue; mastitis

Definition:

An infection located in the tissue of the breast. In most cases bacteria have entered through cracks in the nipples.

Causes, incidence, and risk factors:

Breast infections are usually caused by a common bacteria found on normal skin (Staph aureus). The bacteria enter through a break or crack in the skin, usually the nipple. Breast infections usually occur in women who are breast-feeding. Breast infections that are not related to breast-feeding must be differentiated from a rare form of breast cancer.