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Cyanosis had set into her lips after being out in the cold overnight.
Increased concentration of oxygen
yes cyanosis is usually curable but the cause of cyanosis may not be (e.g. active dying).
Mild cyanosis cannot be seen. But moderate cyanosis can be made out from the oral mucous membranes.
Cyanosis is caused by a lack of oxygen in the blood. Cyanosis is associated with cold temperatures, heart failure, lung diseases, and smothering