What are common signs of an allergic reaction in animals?

Itching, redness, and swelling are classic indicators of an allergic reaction in animals. When an animal is exposed to an allergen, their immune system may overreact, leading to these dermatological symptoms. This reaction is part of the body's defense mechanism, where histamines and other inflammatory mediators are released, causing localized swelling, irritation, and discomfort. Identifying these signs is crucial for veterinary technicians, as they often serve as the first line of defense in recognizing and addressing allergic responses in pets.

In contrast, while vomiting and diarrhea can sometimes accompany allergic reactions, they are more commonly associated with gastrointestinal issues rather than cutaneous allergic responses. Increased appetite and thirst are typically unrelated to allergies and could indicate other underlying health problems, such as diabetes or other metabolic disorders. Fever and lethargy are general symptoms that can arise from many different illnesses, but they are not specific to allergies and often suggest systemic illness rather than localized allergic reactions. Thus, the presence of itching, redness, and swelling directly correlates with an allergic response, distinguishing it as a key sign that veterinary professionals need to monitor closely.