An insect bite or skin allergy reaction resulting in itchiness and swelling is referred to as a?

The correct answer is that an insect bite or skin allergy reaction resulting in itchiness and swelling is referred to as a wheal. A wheal is a specific type of skin elevation that is often raised, itchy, and can appear suddenly after exposure to allergens or irritants such as insect bites or certain foods. This reaction occurs due to the release of histamines in response to the allergen, leading to localized swelling and redness.

In contrast, a rash is a broader term that encompasses various types of skin changes or eruptions that may not always contain the characteristics of a wheal. While lesions refer to any abnormal tissue change, this term is also more general and can refer to a variety of skin conditions without specifying the nature or cause, such as infections or chronic conditions. Pustules are another specific type of lesion characterized by a raised bump filled with pus, commonly associated with acne or other infections. Therefore, the term "wheal" accurately captures the key features of the reaction described in the question.