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The skin of light-skinned individuals turns red in hot conditions due to increased blood flow to the surface of the skin, a process known as vasodilation. This response helps to dissipate heat and regulate body temperature. The red coloration is more pronounced in lighter skin because there is less melanin to mask the underlying blood vessels. As the blood vessels expand, more oxygen-rich blood reaches the skin, resulting in a flushed appearance.

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1w ago

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