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20 lut 2024 · Viral hives in children and toddlers are more common than parents realize. Here, a doctor explains what's normal, and when to call a pediatrician about hives (urticaria).
Urticaria in children can be either acute (often gone within hours to days) or chronic (lasting longer than 6 weeks). In children, acute urticaria is much more common than chronic urticaria. About 40% of children with acute urticaria also have angioedema.
Urticaria is a common skin condition characterised by recurrent, transient, raised pruritic lesions (wheals), more commonly known as “hives”. Occurs due to transient extravasation of plasma into the superficial dermis, as a consequence of mast cell degranulation and histamine release.
27 kwi 2023 · In fact, viral infections cause more than 80 percent of all cases of acute hives in children. A variety of viruses can cause hives (even routine cold viruses). The hives seem to appear as the immune system begins to clear the infection, sometimes one week or more after the illness begins.
Exanthems during childhood are very common and are usually due to specific viral infections: Chickenpox (varicella) Measles (morbillivirus) Rubella (rubella virus) Roseola (herpes virus 6B) Erythema infectiosum (parvovirus B19). Viral exanthems also include: Acute human immunodeficiency virus infection syndrome. Smallpox. Viral hepatitis.
Introduction. Chronic urticaria (CU) is characterized by recurrent migrating skin lesions, called wheals or hives, angioedema (AE) or both lasting over 6 weeks. Wheals consist of a swelling area of different size and shape with a larger erythema, often pruritic. Lesions usually disappear in 24 h.
One in five children or adults has an episode of acute urticaria during their lifetime. It is more common in atopic individuals. It affects all races and both sexes. What causes acute urticaria? Weals are due to release of chemical mediators from tissue mast cells and circulating basophils.
