What does the term "uriticaria" refer to in the context of allergic reactions?

The term "urticaria" specifically refers to hives, which are characterized by raised, itchy welts on the skin. This condition is a common reaction to allergens and can be triggered by various substances, including food, medication, insect stings, or environmental factors. The appearance of these welts is due to the release of histamine and other chemicals in response to an allergen, which causes localized swelling and redness in the skin.

In understanding urticaria, it is essential to recognize how it presents physically and the underlying mechanisms behind this allergic reaction. The identification of urticaria as hives underscores its distinctive features and distinguishes it from other allergic reactions, such as severe swelling (which could refer to angioedema), skin rash (which could encompass a variety of skin conditions), or shortness of breath (often associated with respiratory allergic reactions).