What does a wheal indicate?

A wheal is defined as a type of rounded elevation on the skin that often appears as a raised, itchy area. This skin reaction typically occurs due to a localized swelling caused by fluid accumulation under the skin, usually in response to an allergen or irritant. The characteristic features of a wheal are its raised nature and often a pale color surrounded by redness, making it easily distinguishable from other skin lesions.

In contrast, the other options describe different medical conditions or structures. A chronic skin condition could include various disorders such as eczema or psoriasis but does not specifically identify the raised and itchy feature of a wheal. A cellular process in the intestines relates to digestive functions rather than skin manifestations. An internal organ structure typically refers to anatomical parts of the body like the heart or liver, which are unrelated to the concept of a wheal. Therefore, the definition of a wheal as a rounded elevation that itches is accurate and highlights its specific characteristics in relation to skin reactions.