What happens to tissue during frostnip?

During frostnip, tissue that is exposed to very cold temperatures begins to freeze, leading to a state where it hardens and loses sensation, which is described as becoming insensate. This occurs primarily due to the freezing of the skin’s upper layers, resulting in a temporary condition that is often not as severe as frostbite, but can still cause significant discomfort and risk of further injury if not treated properly.

The mechanism involves the blood vessels constricting to preserve core body heat, which can reduce blood flow to the affected area. As a result, the tissue can feel firm and may also exhibit a pale or waxy appearance. Importantly, while frostnip can cause temporary numbness and discomfort, it typically does not result in permanent damage if managed correctly.

In contrast, the other choices reflect scenarios that do not align with the physiological responses observed in frostnip. For instance, inflamed and red tissue generally suggests an inflammatory response, which is more characteristic of other injuries or conditions. Warmth to the touch indicates sufficient blood flow and heat retention—contrary to what happens during frostnip. Lastly, tissue deterioration is not immediate with frostnip; instead, it tends to recover given appropriate measures are taken to rewarm the area gradually.