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Cyanosis is condition in which a person develops a bluish tint to the skin, fingernails, and fingertips. It's caused by not having enough oxygen in your blood and can occur suddenly or over time due to chronic illness.
A macule is a flat, distinct, discolored area of skin less than 1 cm wide that does not involve any change in the thickness or texture of the skin. A macule occurs without the presence of physical trauma. It is a symptom of medical conditions such...