Hives blister
Syn.: nettle
Def .: Primary eruption in urticaria and nettle burn.
Epid: Approximately 25% of the population has at least one episode of hives eruption.
Etiol .: The essence is the swelling of the upper layers of the dermis, resulting from an increase in vascular permeability and exudate caused by the release of inflammatory mediators, mainly histamine.
Loc .: No predilection places. The blisters can appear in any location, including the scalp, the palms of the hands, and the soles of the feet. Only in delayed pressure urticaria have urticarial blisters in a typical location – places exposed to pressure: hands, soles of feet, buttocks.
Clinical: The efflorescence rose above the surface of the skin, ranging in color from porcelain-white to pale pink, from a few millimeters to several dozen centimeters in size, quickly forming and quickly disappearing without leaving a trace. The hives blister usually remains in one place for no longer than 24 hours. Sometimes the changes are confluent and may last longer, over 24 hours. (delayed pressure urticaria, urticarial vasculitis, Quincke’s angioedema). The spread of urticarial wheals is always accompanied by itchy skin.
Hist .: No characteristic features (post-capillary and lymphatic vasodilation in the lower layers of the dermis), perivascular and interstitial infiltrates of mononuclear cells and eosinophils in delayed pressure urticaria.
But: See Urticaria.
Lit.: [1] Ferrer M.: Epidemiology, healthcare, resources, use and clinical features of different types of urticaria. Alergologica 2005. J Investig Allergol Clin Immunol 2009, 19 Suppl. 2; 21-6. [2] Frigas E., Park M.A.: Acute urticaria and angioedema: diagnostic and treatment considerations. Am J Clin Dermatol 2009, 10(4); 239-50. [3] Maurer M., Grabbe J.: Urticaria: its history-based diagnosis and etiologically oriented treatment. Dtsch Arztebl Int 2008, 105(25); 458-66.
Source: A. Kaszuba, Z. Adamski: “Lexicon of dermatology”; XNUMXst edition, Czelej Publishing House