Which assessment finding may indicate an allergic reaction?

The presence of rashes, hives, swelling, or difficulty breathing is a classic indication of an allergic reaction. Allergic reactions occur when the immune system overreacts to a substance (allergen) that it identifies as harmful. These symptoms can arise from various allergens, such as foods, medications, or environmental triggers.

Rashes and hives are manifestations of the skin reacting to allergens, causing localized inflammation and irritation. Swelling, particularly of the face, lips, or throat, can lead to a more severe response known as anaphylaxis, which requires immediate medical attention. Difficulty breathing results from swelling in the airways or bronchoconstriction, both of which can occur during a significant allergic response.

The other options describe symptoms that may be present in various medical conditions but are not specific indicators of allergic reactions. For example, increased heart rate can happen due to anxiety, fever, or several other causes, while fever and chills generally suggest an infectious process rather than an allergic one. Fatigue and drowsiness can result from multiple factors, including illness or medication side effects, but again do not specifically point to an allergic reaction. Therefore, the symptoms listed in the correct answer clearly align with the recognized signs of allergies, providing clear