Anaphylaxis is a severe, potentially life-threatening allergic reaction that can occur within seconds or minutes of exposure to an allergen. The allergens may include foods, insect stings, medications, or latex. The body's immune system overreacts to these allergens by releasing chemicals that can cause shock; blood pressure drops suddenly, and the airways narrow, blocking breathing.

Immediate medical attention is critical, as anaphylaxis can progress rapidly and may be fatal if not treated promptly. Recognizing the symptoms and understanding the need for urgent action can make a significant difference in outcomes for individuals experiencing an anaphylactic reaction.