Mottling on the skin is a sign of what?

• A. Shock/hypoperfusion
• B. Hypoxia
• C. Hyperperfusion
• D. Normal perfusion

Answer: (A)

Mottling reflects reduced peripheral perfusion from shock. When perfusion drops, the body diverts blood away from the skin to protect vital organs, causing vasoconstriction of the skin’s vessels and uneven filling of the capillaries. The result is a patchy, marbled skin color—mottling—that often appears as a late sign as shock worsens and perfusion becomes more compromised. This indicates the tissues aren’t getting adequate blood flow and oxygen delivery, even if other signs aren’t dramatically abnormal yet.

It’s helpful to contrast other ideas briefly: hypoxia centers on lack of oxygen in tissues and can produce cyanosis or confusion, but mottling specifically signals poor blood flow distribution rather than oxygen content alone. Hyperperfusion would make skin warm and flushed, not mottled. Normal perfusion wouldn’t produce mottling.