How do you know if you have breast cancer? Irritation on the breast area. New lump in the armpit or breast area. Pain in the nipple area. Discharge from the nipple other than milk. Swelling of the breast area. Redness in the nipple or breast area. Change in size and shape of the nipple. The above are the signs and symptoms of breast cancer. If you notice any of the above signs, make an appointment with your doctor today! and get the best medical assistance . Artemis Hospital is considered the best hospital for breast cancer treatment in India . Read More: Is wearing a bra/brassiere a cause for breast cancer? How?