What is one possible name for a severe allergic reaction?

A severe allergic reaction is commonly referred to as anaphylactic shock. This condition is characterized by a rapid onset of symptoms that can include difficulty breathing, swelling of the throat and tongue, a drop in blood pressure, and skin reactions such as hives. Anaphylactic shock occurs when the immune system overreacts to an allergen, releasing a flood of chemicals that can lead to shock, organ failure, or even death if not treated immediately.

The other options describe various allergic or inflammatory conditions but do not reach the level of severity associated with anaphylactic shock. Asthma, for example, is a chronic condition affecting the airways and can involve allergic triggers, but it does not signify the acute and life-threatening response seen in anaphylaxis. Urticaria, commonly known as hives, is characterized by raised, itchy welts on the skin but is usually not life-threatening. Dermatitis refers to inflammation of the skin, which can be caused by allergens, but it does not represent the systemic reaction that occurs in anaphylactic shock.