What are some signs of an allergic reaction?

The presence of a rash, itching, and swelling is indicative of an allergic reaction, as these symptoms are common manifestations of the body's immune response to an allergen. When an allergen is encountered, the immune system may react by releasing histamines and other chemicals, leading to localized inflammation and discomfort. This reaction often appears on the skin as hives or a rash, accompanied by itchiness. In more severe cases, swelling can occur, particularly around the eyes, lips, or throat, which can pose significant health risks. Recognizing these symptoms is crucial for timely intervention and management of allergic reactions, as they can escalate quickly in some individuals.