Cold allergy is a subtype of urticaria, which involves the appearance of urticarial lesions (raised red rashes, extremely itchy) accompanied by inflammation, which appears within a few minutes after exposure to cold. According to specialists, patients react to a wide range of triggers, including cold air, contact with cold liquids, contact with cold solid surfaces and ingestion of cold food or drink. At this time, it is not known exactly what causes cold hives, only that certain people seem to have very sensitive skin cells, due to an inherited trait, virus or disease.
In the most common forms of this condition, cold triggers the release of histamine and other mediators into the bloodstream, leading to hives and sometimes, in rare cases, even cold-induced anaphylaxis. What is known is the fact that cold urticaria can occur through a primary mechanism (idiopathic) or it can be secondary to a hematological disease (blood disorders), or an underlying infection. Most cases are idiopathic, that is, of unknown cause.
Signs and symptoms of cold allergy can range from mild to severe and may include: temporary hives (erythemato-edematous, itchy papules and plaques) on the area of skin that has been exposed to cold or a sudden drop in air temperature, or in cold water; swelling of the hands while holding cold objects; swelling of the lips due to the consumption of cold food or drinks. Unfortunately, severe reactions can include anaphylaxis. It represents a life-threatening situation due to the rapidity with which the symptoms follow and the rapid onset, within a few minutes of contact with the inducing agent, in this case exposure to cold.
2024-01-22 13:45:15
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