Have you ever put on a pair of second-hand shoes and then noticed a small yellow bump forming on your toe? It can feel uncomfortable and even worrying at first, but in most cases it’s harmless. That yellow bump is usually a corn or callus—a patch of thickened skin that develops when your body tries to protect itself from repeated rubbing or pressure. Why Does This Happen?Pre-owned shoes are a common cause because they rarely fit a new wearer perfectly. Over time, shoes mold to the original owner’s foot shape, creating pressure spots, seams, or worn areas that don’t align...
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