Urticaria


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Related to Urticaria: atopic dermatitis

urticaria

[‚ərd·ə′kar·ē·ə]
(medicine)
Hives or nettle rash; a skin condition characterized by the appearance of intensely itching wheals or welts with elevated, usually white centers and a surrounding area of erythema. Also known as hives.

Urticaria

 

nettle rash, an allergic reaction characterized by the sudden and rapid appearance on the skin (sometimes also on the laryngeal mucosa) of intensely itching wheals.

Urticaria is often caused by the sting of the nettle and certain other plants. Insect bites, temperature, and chemical agents are also among its causes. Other factors include parasitic worms, chronic constipation, liver and kidney diseases, and allergic sensitivity to some foods (for example, strawberries, citrus fruits, eggs, mushrooms, preserves, certain fish, pork, and chocolate). 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. This results from the liberation of histamine from the mast cells of the skin by allergic alteration. Urticaria usually disappears without a trace within a few hours, although it sometimes recurs. It is treated by purgation (by enemas, laxatives), special diet (mostly milk and vegetables, with limited salt intake), and desensitizing and anti-histaminic agents.

REFERENCE

Pavlov, S. T. Kozhnye i venericheskie bolezni, 2nd ed. Moscow, 1969.

R. S. BABAIANTS

References in periodicals archive ?
The proband tried numerous treatment modalities to suppress his urticaria, including the following antihistamines: levocetirizine, cetirizine, fexofenadine, and loratadine.
In this study, we evaluated the role of foods as triggers of urticaria in CSU patients, taking into account not only self-reported information, but also challenge test.
Concerning the long duration of CSU on average, prognostic factors have been widely investigated, but only few have been found to be significantly associated with longer disease duration: its severity [6, 7], the concurrent presence of angioedema [7, 8] or inducible urticaria [8, 9], the finding of positive response against their own serum in the so-called "autologous serum skin test" (ASST) [9, 10], and concomitant arterial hypertension [11].
Urticaria can be recognised because the red, itchy spots come up and disappear in a matter of minutes, usually about 20.
Thankfully, most cases of urticaria disappear as quickly as they arise -- even if treatment with antihistamines isn't effective -- which it often isn't.
Urticaria (acute and chronic) is the fourth most prevalent allergic condition after rhinitis, asthma and drug allergy, but the number of patients who visit emergency departments due to urticaria is higher compared to these other allergic diseases1.
"Epidemiologic studies estimating disease burden for chronic urticaria are sparse, [but this study] is based on one of the largest and most ethnically diversified population samples in the United States," they wrote.
CU is a case marked by almost daily spontaneous appearance of hives and/or angioedema.3 The causes of CU may be unknown or known causes.4 However, a patient may have more than one subtype of urticaria at the same time.
(3-6) Here, we report a 10-year-old boy who had urticaria associated with fluoxetine use, showed recovery after the cessation of the drug, and manifested with urticaria and angioedema after the re-prescription.
"The results are consistent with Chronic Spontaneous Urticaria likely autoimmune in view of the positive thyroid autoantibodies," Kris quoted her doctor's diagnosis.
To the Editor: Cold urticaria (CU) accounts for 1-3% of all urticaria cases.