Which sign is commonly associated with hypoxia?

Cyanosis is a sign that is commonly associated with hypoxia because it reflects a lack of sufficient oxygen in the blood. When oxygen levels drop, the body tissues and blood can take on a bluish tint, particularly in areas with thin skin or where blood vessels are close to the surface, such as the lips, fingers, and toes. This change in color is primarily due to the presence of deoxygenated hemoglobin in the blood, which has a darker hue than oxygenated hemoglobin.

In contrast, elevated temperature is generally indicative of infection or inflammation rather than directly related to oxygen levels in the blood. Erythema, which refers to redness of the skin, can be a sign of various conditions but is not directly linked to hypoxia. Jaundice, characterized by a yellowing of the skin and eyes, is typically associated with liver dysfunction or excessive breakdown of red blood cells, not with low oxygen levels in the bloodstream.