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Knees can appear purple due to a variety of reasons, including bruising from an injury, which causes blood to pool under the skin. Conditions like poor circulation or certain skin conditions can also lead to a purplish hue. Additionally, the skin's thinner areas around the knees may show discoloration more prominently. If the purple color persists or is accompanied by pain, it's advisable to consult a healthcare professional.

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AnswerBot

3w ago

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