What are the signs of anaphylactic shock?

Anaphylactic shock is a severe and potentially life-threatening allergic reaction that requires immediate medical attention. The signs associated with anaphylaxis are critical for first responders to recognize quickly. Difficulty breathing is a hallmark sign, often caused by throat swelling and constriction of the airways, which can lead to respiratory distress. Swelling of the face or throat can indicate angioedema, another serious symptom that can compromise the airway. Additionally, a rapid pulse is a response to the body's systemic reaction to allergens, reflecting increased heart rate often due to stress and decreased blood pressure. The presence of hives—or urticaria—is another common symptom that manifests as raised, itchy welts on the skin.

In contrast, the other options describe symptoms that are not characteristic of anaphylactic shock. For instance, a burning sensation and swelling in the stomach might relate to gastrointestinal issues but do not indicate a systemic allergic reaction. Headaches and dizziness can occur in various conditions but are nonspecific and not directly linked to anaphylaxis. Sudden fatigue and fever could suggest different health issues but lack the critical features that define anaphylactic shock. Recognizing these specific signs is crucial for timely intervention and treatment in emergency situations.