Frostnip is:

• A. A deep tissue freezing injury.
• B. A heat-related superficial burn.
• C. A non-freezing skin reaction.
• D. Reversible freezing of superficial skin layers with numbness and whiteness.

Answer: (D)

Frostnip is a mild cold injury that only affects the surface of the skin. It happens when the outer skin layers freeze, causing numbness and a pale, white (whitened) appearance. It is reversible with gentle warming, and there’s no lasting tissue damage if treated promptly. This is why the best description is the reversible freezing of superficial skin layers with numbness and whiteness.

It’s helpful to contrast it with frostbite, where deeper tissues actually freeze and can be damaged, and with heat-related or non-freezing skin injuries, which don’t involve superficial freezing and the same numb/white symptoms. Rewarming should be gentle and done with warm, not hot, methods, avoiding rubbing or applying direct heat, and seek care if symptoms don’t resolve quickly or if blisters develop.