Cold urticaria is a skin reaction to cold that shows up within minutes after cold exposure. Affected skin develops scratchy welts. People with cold urticaria experience commonly various symptoms. For some people with this condition, swimming in cold water could lead to very low blood pressure, shock or fainting. Cold urticaria happens most frequently in young people. Cold urticaria symptoms begin soon after the skin is revealed to an abrupt decrease in air temperature level or to cold water. The worst responses typically accompany complete skin exposure, such as swimming in cold water.
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