The most common sign of breast cancer is a new lump or mass. Other signs of breast cancer include the following:
• a swelling, warmth, redness or darkening of part of the breast
• dimpling or puckering of skin
• nipple pain or the nipple turning inward
• itchy, scaly sore or rash on     nipple or breast                                      
• a nipple discharge that starts suddenly that is not breast milk
• change in size or shape of breast