Dear ratbag, Mastitis refers to inflammation of the breast and
usual symptoms of mastitis are pain in an area progressing to redness, and
warmth. Fever, chills, and flulike symptoms or body aches can also develop. While mastitis most commonly occurs in women who are breast-feeding it can also occur in women who are not breast-feeding. This could be due to a dilated or irregular milk duct, an injury to the breast (such as a cut or bite), or less commonly due to breast cancer.