Which statement best describes a set of signs that indicate anaphylaxis requiring urgent treatment?

• A. Isolated eyelid swelling.
• B. Generalized hives or swelling, tongue or throat swelling, wheeze/shortness of breath, dizziness, hypotension, and loss of consciousness.
• C. Mild stomach upset after eating.
• D. Nasal congestion with sneezing.

Answer: (B)

Anaphylaxis is a rapid, life-threatening allergic reaction that involves multiple organ systems, especially the airways and circulation. When signs spread beyond a localized reaction to include both skin/mucous membrane involvement and airway or cardiovascular symptoms, urgent treatment is required. The best description is generalized hives or swelling along with swelling of the tongue or throat, wheeze or shortness of breath, dizziness, low blood pressure, and possible loss of consciousness. This combination shows widespread, system-wide impact and the need for immediate actions such as epinephrine and emergency care.

Isolated eyelid swelling, mild stomach upset after eating, or nasal congestion with sneezing are more limited or typical of milder allergic reactions and do not by themselves indicate the urgent, systemic involvement seen in anaphylaxis.