Which description fits a wheal?

A wheal is characterized as a smooth, slightly elevated, edematous area on the skin. This condition typically arises due to localized swelling caused by fluid accumulation in the dermal layer, often resulting from an allergic reaction or other inflammatory responses. The elevation and softness associated with wheals make this option the most accurate description.

In contrast, other options may refer to different types of skin lesions. A hard, solid growth relates more to a nodule or tumor. A discolored flat lesion represents macules or patches, while inflamed tissue with ulceration describes a more severe and complex skin condition. None of these alternatives encompass the specific characteristics of a wheal, underscoring why the correct choice succinctly identifies the defining features associated with wheals.