BAKGRUND Akut urtikaria beskrivs i översikten "Läkemedelsreaktioner och hud", se länk nedan. Visa översikt "Läkemedelsreaktioner och hud"Kronisk urtikaria definieras som urtikaria som pågår utan avbrott i minst 2 månader.Orsaken är okänd hos merparten av patienterna och många har en associerad dermografism (tryckurtikaria). Kronisk urtikaria kan trots behandling pågå i flera år

These include tranexamic acid and sodium cromoglycate in CSU, 149, 150 nifedipine in symptomatic dermographism/urticaria factitia 151 and colchicine and indomethacin in delayed pressure urticaria. 152, 153 However, more research may be needed for patient subgroups, for example recently Ref. 154 a pilot study of patients with elevated D‐dimer

Papler eller noduli Strophulus? Prurigo? Willan's itch and other causes of pruritus in the elderly. Int J Dermatol. 2005;44 (4):.

If this is the case, try to identify the allergen and avoid exposure to it. Bacterial, viral, parasitic or fungal infections, for example with H. pylori, streptococci, staphylococci, Yersinia, Giardia lamblia, Mycoplasma pneumoniae, hepatitis viruses, norovirus, parvovirus B19, Anisakis simplex, Entamoeba spp, Blastocystis spp, have been implicated to be underlying causes of urticaria. 36-38 The frequency and relevance of infectious diseases vary considerably between different patient groups and different geographical regions. Vid urtikaria utlöst av födoämne eller läkemedel är naturligtvis elimination den viktigaste åtgärden (se födoämnesöverkänslighet) I en del fall av kronisk urtikaria där man inte kan påvisa överkänslighet mot något speciellt födoämne kan det ändå löna sig att göra ett tidsbegränsat behandlingsförsök med kost fri från konserveringsmedel och andra ”pseudoallergen”.

Hives, also called urticaria, are bumps that appear on the skin quickly and often disappear as fast as they show up. They may be red or the color of your skin.

Fysisk urticaria kan udløses af kulde, varme, vand, tryk og sol på huden. "Urticaria factitia" (urticariel dermografisme) er en tilstand, hvor personen udvikler nældefeberelementer som følge af, at man kradser let i huden. Elementerne svinder inden få timer. Ved urticaria factitia kan almindelig berøring af huden give kløe.

Epub 2019 Apr 10. Urticaria factitia (also known as dermographic urticaria and symptomatic dermographism) is characterized by whealing and itching following a minor stroking pressure, rubbing or scratching of the skin. The majority of patients with urticaria factitia benefits … Forms of Urticaria.

Cholinergic urticaria is due to an increase in body temperature because of sweating, exercise, hot showers and/or anxiety.

In chronic inducible urticaria, weals appear about 5 minutes after the stimulus and last a few minutes or up to one hour. Urticaria is a transient erythematous swelling of the skin, associated with itching, which usually resolves within 24 hours. It is caused by degranulation of histamine containing cells (mast cells) in the superficial dermis.

Some people get urticaria as an allergic reaction while others get it without any known cause. Common foods that cause allergies are citrus fruits, milk, nuts, and shellfish. If you experience hives in addition to symptoms like a runny nose, sneezing or coughing, watery eyes, or other respiratory problems, it might be safe to assume that you have an allergy. If this is the case, try to identify the allergen and avoid exposure to it. What causes urticaria?
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10, 11). Urticaria factitia (Urticarial Dermographism): It is caused by shear forces acting on the skin. Such shearing forces arise, for example, when the skin is scratched, rubbed, and chafed.

Urticaria factitia (Urticarial Dermographism): It is caused by shear forces acting on the skin. Such shearing forces arise, for example, when the skin is scratched, rubbed, and chafed. Delayed pressure urticaria: Persistent pressure triggers the hives (urticaria) with a time delay – the wheals form three to twelve hours later. Most frequent physical urticaria with mostly linearly arranged wheals in the area of mechanically irritated skin areas, e.g.
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Urticaria factitia tarda. Pressure test (0.5-1.5 kg/cm2 for 10 and 20 minutes) cold urticaria. Cold test (ice in plastic tubes, cold water, different temperatures to determine the tolerance threshold); test with cold wind (fan) if necessary; cryoproteins, exclusion of bacterial or viral infections. Thermal urticaria

The exact cause of dermographic urticaria is unknown. Histamine is the main chemical released by mast cells when the skin is stroked, but other chemical mediators may also be involved. Some patients with severe dermographism may carry an autoantibody to some unknown cutaneous protein . 2009-12-01 In the last two decades, great progress was made in researching the causes of urticaria. The causes of chronic spontaneous urticaria can be divided into three broad groups: Autoreactivity, intolerance to certain foods or medicine and infectious diseases. Urticaria is sometimes caused by hypersensitivity to drugs (especially to those of chemical origin). The rash associated with the condition is a manifestation of the inflammatory reaction and edema of the skin that result from a sudden increase in the permeability of the capillaries in the area.