What is the reaction called when an insect bite or skin allergy causes itching and swelling?

The correct term for the reaction that occurs when an insect bite or skin allergy triggers itching and swelling is known as a wheal.

A wheal is characterized by a raised, itchy area of skin that can be red or pale and is often a result of various allergens causing the body to release histamines. This reaction leads to localized edema (swelling) in the skin, creating the well-defined appearance associated with a wheal. Insect bites and allergic reactions frequently lead to this type of response, as the body's immune system reacts to the perceived threat, resulting in the classic symptoms of itching and swelling.

Understanding this term is essential for recognizing and addressing the immediate reactions of the skin to irritants or allergens, aiding in effective treatment or management of the symptoms.