As we know, early-stage cancer is more likely to respond to treatment compared to one that has grown deeply in surrounding tissues.For starters, stand in front of the mirror and of course, take a good look at your breasts. A lump or mass in the breast is the most common symptom of breast cancer. Swelling in or around your breast, collarbone, or armpit. Skin thickening or redness. Breast warmth and itching. Everyone’s breasts are different, so get to know how your breasts normally look and feel. That way, it’s easier to spot anything unusual. Remember to check the whole breast area, including your upper chest.