Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Cyanosis
Medically reviewed by Min Clinic Staff | Updated: January 2026
Cyanosis: A bluish color of the skin and the mucous membranes due to insufficient oxygen in the blood. For example, the lips can develop cynanosis when exposed to extreme cold. Cyanosis can be present at birth, as in a 'blue baby,' an infant with a malformation of the heart that permits into the arterial system blood that is not fully oxygenated.