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Mehmet Oz, MD, Cardiology (Cardiovascular Disease), answeredOne common reason skin starts to flake off is that it's too dry. As your skin loses moisture, it can become flaky or scaly. In serious cases, dry skin may even crack and bleed. Flaky skin is more common in the winter, when humidity is low and heating systems cause indoor air to become dry. Using moisturizer, running a humidifier in your home and workplace, and drinking plenty of water can help battle dry skin.