This document discusses different types of mastitis, a common inflammation of the breast tissue that can occur when breastfeeding. It outlines signs and symptoms of mastitis such as breast tenderness and pain. Common causes include issues with breastfeeding attachment, blocked milk ducts, or stopping breastfeeding suddenly. Treatment involves continuing to breastfeed or express milk, applying heat or cold compresses, and potentially antibiotics. Prevention focuses on proper breastfeeding techniques and emptying the breasts regularly to avoid blockages. The document also briefly discusses other breast conditions such as cysts, fibroadenomas, and breast abscesses.