What is the term for a raised, red, itchy area of skin that is often allergic in nature?

The term "wheal" refers to a raised, red, itchy area of skin that typically results from an allergic reaction or irritation. Wheals are often caused by the release of histamines, which lead to swelling and redness in response to allergens such as insect bites, certain foods, medications, or other environmental factors.

Wheals can appear suddenly and often have well-defined edges, making them distinct from other skin lesions. Their itchy nature is a key characteristic, prompting individuals to scratch the affected area, which can sometimes exacerbate the irritation. Understanding the nature of wheals helps in diagnosing allergic reactions and managing symptoms effectively.

In contrast, pustules are filled with pus, nodules are solid, raised masses that are deeper in the skin, and macules are flat, discolored areas with no elevation. These distinctions clarify why a wheal specifically describes the condition outlined in the question.