What symptoms indicate that a person is experiencing a food allergy reaction?

A person experiencing a food allergy reaction typically shows symptoms such as hives, difficulty breathing, or swelling. These symptoms are part of the body's acute immune response to a specific allergen found in food. Hives, or urticaria, are raised welts on the skin that indicate histamine release, while difficulty breathing is a serious manifestation that suggests the person may be experiencing anaphylaxis, a severe and potentially life-threatening reaction. Swelling, particularly around the face, lips, or throat, can indicate a dangerous response that requires immediate medical attention. Recognizing these symptoms is crucial for quick action, as food allergies can lead to severe consequences if not addressed promptly.

The other options present symptoms that are not typically associated with food allergy reactions. Headaches and nausea can arise from numerous causes unrelated to food allergies, and fatigue and low energy are more general symptoms that do not specifically indicate an allergic reaction. Fever and chills are common indicators of infection rather than an allergic response, highlighting the importance of understanding the distinct characteristics of food allergy symptoms for proper identification and response.