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प्रश्न
Why does a cut in the skin become red, swollen, warm, and painful?
लघु उत्तर
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उत्तर
A cut in the skin becomes red, swollen, warm, and painful due to inflammation. This happens because blood vessels dilate and become more permeable, allowing immune cells and fluids to enter the area to fight infection and promote healing. Chemicals like histamine cause these changes, leading to redness, heat, swelling, and pain.
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