A person experiencing anaphylaxis often shows which signs and symptoms?

Anaphylaxis is a severe, potentially life-threatening allergic reaction that occurs very rapidly, often within minutes of exposure to an allergen. The signs and symptoms of anaphylaxis are critical to recognize promptly, as they require immediate medical intervention.

Trouble breathing is a hallmark of anaphylaxis due to swelling of the airways and difficulty in airflow, which can lead to wheezing or stridor. Additionally, shock can occur as a result of a rapid decrease in blood pressure, known as anaphylactic shock, which can be caused by widespread vasodilation and increased vascular permeability leading to fluid loss from the circulation. This combination of respiratory distress and shock is what makes anaphylaxis a medical emergency that demands immediate attention.

While skin rashes, nausea, and other symptoms can occur during anaphylaxis, they are not the defining signs that indicate the severity of the reaction or the immediate need for life-saving treatment. Recognizing the combination of trouble breathing and shock allows responders to implement emergency protocols, such as administering epinephrine, thus significantly improving the chances of a positive outcome for the person experiencing the reaction.