How should frostbite be managed to avoid tissue damage, and what is the risk with rapid rewarming?

• A. Avoid refreezing tissue; if rewarming is performed, do so in a controlled manner to minimize reperfusion injury and arrhythmias.
• B. Rewarm as quickly as possible with hot water to relieve pain.
• C. Rewarm only after tissues become hard and pale.
• D. Ignore rewarming and monitor until spontaneous thawing.

Answer: (A)

Frostbite injuries are damaged by both the initial freezing and the way tissue is returned to blood flow. The moment you rewarm tissue, blood rushes back in, and that sudden reperfusion can cause further injury to cells and the microvasculature, plus inflammatory swelling and electrolyte shifts that can lead to arrhythmias. Because of this, the goal is to protect the tissue from additional harm by avoiding refreezing, and if rewarming is done, to do it in a controlled way that moderates the return of blood flow.

Rewarming in a controlled, gentle manner—typically in warm water around 37–39°C until the tissue becomes pliable and color returns—helps minimize reperfusion injury and reduces the risk of rhythm problems. This approach also helps limit pain and further tissue damage. The other options promote conditions that can worsen injury: warming too aggressively with very hot water can burn tissue; waiting until the tissue is hard and pale delays care and often allows more damage to occur; and ignoring rewarming altogether leaves the injury untreated and at higher risk of progression.