Cyanosis: Have a cardiology work up done. a bluish color to the lips can mean certain kinds of heart abnormalities causing decreased oxygen content in the blood. A pulse oximeter will help show oxygenation of the blood without much fuss. A rare cause would be methhemoglobinemia. http://www.nlm.nih.gov/medlineplus/ency/article/000562.htm
Answered 8/20/2014
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