What is a common symptom of anaphylaxis?

Anaphylaxis is a severe, potentially life-threatening allergic reaction that occurs rapidly after exposure to an allergen. A common symptom includes skin reactions such as itching, hives, and flushing. Hives—raised, itchy welts on the skin—are particularly indicative of an allergic reaction. These symptoms often appear quickly, within minutes of exposure, making them critical to recognize in emergency situations.

The other symptoms listed, such as fatigue, lethargy, constant sneezing, and headaches, are generally not primary indicators of anaphylaxis. While these may occur in different medical situations, they do not encapsulate the hallmarks of a severe allergic reaction, which predominantly involves skin manifestations and systemic responses, including difficulty breathing, swelling, and gastrointestinal symptoms. Recognizing and understanding the signs like itching, hives, and flushing is essential for timely intervention during anaphylactic emergencies.