What is the definition or description of: breast infection?

Mastitis: Infection of the breast can be seen from different bacteria or other organisms. Most commonly, bacteria that are normally on the skin infect the breast from breaks in the skin or through the ducts. Patients may have redness, warmth or swelling. You should consult with your primary care physician if you have any questions. Patients with breast implants should pay close attention to any changes.

Mastitis...: Breast infection, also known as mastitis, indicates inflammation of breast tissue or overlying skin. Most commonly mastitis is caused by bacteria which has entered the breast tissue through a break or crack in the skin, often near the nipple, resulting in swelling and tenderness. Most often mastitis is associated with breastfeeding or physical injury to the breast and rarely to breast cancer.