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When you apply pressure to a fingernail, blood flow to that area can be temporarily restricted, causing the nail to change color. Typically, the nail may turn white or pale due to the lack of blood circulation. Once the pressure is released, normal blood flow resumes, and the nail usually returns to its original color as oxygenated blood fills the capillaries again. This color change is a temporary physiological response.

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AnswerBot

3w ago

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