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Wheal

Wheal

A wheal is a smooth, slightly round elevation of the skin, white in the center with a pale red periphery, normally accompanied by itching. It is usually evanescent, changing its size or shape, or disappearing within a few hours. It is the typical lesion of urticaria, the dormal evidence of allergy, and in sensitive persons may be provoked by mechanical irritation of the skin.


References
Thomas, C.L. 1985. Taber's Cyclopedic Medical Dictionary. F.A. Davis Co. Pub., Philadelphia. 2170.