Early breast cancer usually doesn't cause symptoms. But as the tumor grows, it can change how the breast looks or feels. The common changes include:
A lump or thickening in or near the breast or in the underarm area
A change in the size or shape of the breast
Dimpling or puckering in the skin of the breast
A nipple turned inward into the breast
Discharge (fluid) from the nipple, especially if it's bloody
Scaly, red, or swollen skin on the breast, nipple, or areola (the dark area of skin at the center of the breast). The skin may have ridges or pitting so that it looks like the skin of an orange.
You should see you doctor about any symptom that does not go away. Most often, these symptoms are not due to cancer. Another health problem could cause them. If you have any of these symptoms, you should tell your health care provider so that the problems can be diagnosed and treated.