wheal (hwēl) a localized area of edema on the body surface, often attended with severe itching and usually evanescent; it is the typical lesion of urticaria.
Wheal
wheal
wheal (w[h]ēl),
wheal (w l)n. A small swelling on the skin, as from an insect bite, that usually itches or burns. Also called welt. |
Wheal
A smooth, slightly elevated area on the body surface, which is redder or paler than the surrounding skin.
Mentioned in: Hives
wheal
[wēl]
Etymology: AS, walu, pimple
smooth, slightly elevated area on the skin that is redder or paler than the surrounding skin. A wheal usually itches and can change size or shape or disappear within hours. It is the typical lesion of urticaria.
wheal (w[h]ēl),
n edematous elevation of the skin or mucosa. See also urticaria.
wheal
a localized area of edema on the body surface, often attended with severe itching and usually evanescent. It is the typical lesion of urticaria.
wheal and flare reaction
a central blanching surrounded by an erythematous zone of varying diameter, sometimes with pseudopodia, observed on the skin in response to intradermal exposure to allergen (antigen). A basis for detecting particular immediate hypersensitivities in an individual. Produced following release of histamine from mast cells bearing IgE bound to Fc receptor.
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