A localized inflammatory lesion of the skin, usually found in the extremities following exposure to nonfreezing cold temperatures
a) Frostnip, a superficial form of cold injury characterized by reversible damage to the skin due to exposure to cold temperatures.
b) Chilblains, also known as pernio, which are inflammatory skin lesions that occur in response to prolonged exposure to damp and cold conditions.
c) Cold urticaria, a condition characterized by the development of hives or welts on the skin after exposure to cold temperatures.
d) Raynaud's phenomenon, a vasospastic disorder causing episodes of reduced blood flow to the fingers and toes, typically triggered by cold or stress.