Which cold-related disorder is described as painful itching swelling of the skin due to poor circulation in cold?

Which cold-related disorder is described as painful itching swelling of the skin due to poor circulation in cold?

• A. Frostbite
• B. Frostnip
• C. Trench Foot
• D. Chilblain

Answer: (D)

Cold-related skin injuries can look similar at first, but the key idea here is how the skin responds to cold in a non-freezing way. Chilblains arise after exposure to cold, damp conditions and involve an inflammatory reaction of the small blood vessels in the skin. When the skin is chilled, the vessels constrict to conserve heat, and on rewarming they can overreact, allowing fluid to leak into surrounding tissue and triggering inflammation. That inflammatory swelling is painful and itchy, often appearing on fingers or toes, even though the tissue itself isn’t frozen. This differentiates it from frostbite, where tissue actually freezes and becomes pale, hard, and numb and may blister or slough. Frostnip is a milder freezing injury with numbness but no swelling, and trench foot results from prolonged exposure to wet cold leading to nerve and tissue damage with swelling and altered sensation. So the combination of itching, swelling, and cold exposure due to a vascular inflammatory response points to chilblains.

Cold-related skin injuries can look similar at first, but the key idea here is how the skin responds to cold in a non-freezing way. Chilblains arise after exposure to cold, damp conditions and involve an inflammatory reaction of the small blood vessels in the skin. When the skin is chilled, the vessels constrict to conserve heat, and on rewarming they can overreact, allowing fluid to leak into surrounding tissue and triggering inflammation. That inflammatory swelling is painful and itchy, often appearing on fingers or toes, even though the tissue itself isn’t frozen. This differentiates it from frostbite, where tissue actually freezes and becomes pale, hard, and numb and may blister or slough. Frostnip is a milder freezing injury with numbness but no swelling, and trench foot results from prolonged exposure to wet cold leading to nerve and tissue damage with swelling and altered sensation. So the combination of itching, swelling, and cold exposure due to a vascular inflammatory response points to chilblains.