Cyanosis is a medical term that describes a condition where the skin and mucous membranes take on a bluish tint due to
deoxygenated hemoglobin in the blood. It is often an indication of impaired oxygen delivery to the body's tissues and can be caused by various factors, including but not limited to heart failure, lung diseases, and conditions that affect the circulatory system. Cold temperatures can also temporarily cause a person's lips or extremities to appear cyanotic without necessarily indicating a serious health issue.
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