Sign 1: An obvious lump in the breast
Sign 2: An unusual increase in the size of one breast
Sign 3: Puckering of the skin of the breast or tethering - seen particularly when one leans forward or raises one's arm
Sign 4: One breast lower than the other. Nipples at different levels.
Sign 5: Swelling of the upper arm
Sign 6: New dimpling of the nipple
Sign 7: A change in the skin of the nipple
Sign 8: An enlargement of the lymph nodes