Other signs of infection include a red or swollen area around the base of the stump, yellow or white pus, a foul odor, or if it seems like the area is painful. (easybabylife.com)
You may need to be evaluated in a hospital's emergency department if the breast pain is associated with other signs of an infection (such as a fever, swelling, or redness to the breast) and if your health care provider can not see you promptly. (webmd.com)
Other signs of this infection include: vomiting, fever, lack of appetite, reduced urine output, unusually dark or brown urine, and lethargic behavior. (itchmo.com)