Acrocyanosis

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Notion

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Science and technology

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What Wikipedia says

Acrocyanosis is persistent blue or cyanotic discoloration of the extremities, most commonly occurring in the hands, although it also occurs in the feet and distal parts of the face. Although described over 100 years ago and not uncommon in practice, the nature of this phenomenon is still uncertain.

Excerpt from the Wikipedia article “Acrocyanosis”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: James Heilman, MD, CC BY-SA 3.0, via Wikimedia Commons.