What are the main signs and symptoms of breast cancer?

    Written by:

    Fact-checked

    by:

    Last Updated: May 16, 2025

    The main signs and symptoms of breast cancer include a new lump or thickening in the breast or armpit, pain or changes in breast shape/size, skin dimpling or puckering, unusual nipple discharge, and scaly or swollen skin in the breast or nipple area. It's important to note that many breast lumps are noncancerous.

    Some symptoms of breast cancer include:[1]

    • A new lump or thickening in or around the breast or armpit (note that often breast lumps are found to be non-cancerous)
    • Pain in breast area or change in breast shape/size
    • Breast skin dimpling or puckering, or a nipple turned inward
    • Unusual nipple discharge (e.g. bloody, sudden, one sided) other than breast milk
    • Scaly, red, or swollen skin in the nipple area or the breast
    What are the main signs and symptoms of breast cancer? - Examine