Which term indicates bluish skin discoloration due to poor oxygenation?

• A. Erythematous
• B. Pale
• C. Jaundiced
• D. Cyanotic

Answer: (D)

Cyanosis is the bluish discoloration of the skin and mucous membranes that occurs when there isn’t enough oxygen in the blood. This happens because deoxygenated hemoglobin has a darker, bluish color, so when its levels in the capillaries rise, the skin and lips, tongue, or nail beds take on a blue tint. It’s a sign of systemic hypoxemia (central cyanosis) or localized poor circulation (peripheral cyanosis) and often points to respiratory or cardiovascular problems. Other terms describe different color changes: erythematous means red from inflammation or heat, pale indicates lightened color from anemia or reduced perfusion, and jaundiced means yellow from high bilirubin.