1. THICKENING NEAR THE ARMPIT If the skin on the upper corner of your chest (where it intersects with your armpit) feels thick or knotty, it could indicate a tumour that has spread to the nearby lymph nodes.

2. SCALING AROUND THE AREOLA If any section of the areola seems scaly, or you notice a sore there that doesn't heal after a few weeks, you may have a rare form of breast cancer called Paget's disease. 

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3. A PUCKERED TEXTURE As a tumour grows in breast tissue, it can crowd out the ligaments that make skin firm and smooth, causing a dimpled, creased appearance.

4. CHANGE IN COLOUR A reddish skin inflammation that appears on any part of your pair and persists for more than a few weeks may be a sign of the disease.

5. AN INVERTED NIPPLE While some women are born with one or both of their nipples turned inward, one that suddenly retracts is a sign that a lump may be growing under the breast's areola.  

Source: Eva Singletary, M.D., professor of surgical oncology at the University of Texas M.D. Anderson Cancer Center, Houston, US

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