How is a urticarial lesion commonly described?

A urticarial lesion is commonly described as a wheal, which is characterized by a raised, itchy area of skin that often has a pale center and is surrounded by redness. Wheals are typically associated with allergic reactions and can vary in size and shape. They form due to the release of histamine and other substances from mast cells in the skin, which causes local edema and inflammation. This distinct presentation is what sets wheals apart from other types of lesions such as patches, macules, or pustules.

Patches refer to flat areas of color change that are larger than a macule, while macules are small, flat, discolored areas on the skin without elevation. Pustules are small, raised lesions filled with pus. While these other terms describe various dermatological conditions, they do not capture the specific characteristics of a urticarial lesion, which is why wheal is the correct term for such lesions.