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Definition: A smooth, slightly elevated area on the body surface, which is redder or paler than the surrounding skin. It is the typical lesion of urticaria, the dermal evidence of allergy, and in sensitive persons may be provoked by mechanical irritation of the skin.

Synonyms (terms occurring on more labels are shown first): wheal, wheals, Welt, welts

More information: PubMed search and possibly Wikipedia

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