What are the main symptoms of an allergic reaction?

An allergic reaction typically manifests through the body's immune system responding to a substance it mistakenly identifies as harmful. The main symptoms include inflammation, redness, and skin rashes, indicating the body’s defense mechanisms are in action. When allergens enter the body, they can trigger the release of histamines and other chemicals, leading to these symptoms as the skin reacts.

Inflammation is the body’s natural response to protect itself, while redness occurs due to blood vessels dilating in the affected area. Skin rashes, which can vary in appearance from hives to eczema, are also common signs of an allergic reaction, as the skin often becomes irritated or inflamed due to the allergen. These symptoms are essential in recognizing and diagnosing allergic responses, making the identified option the most accurate regarding the typical manifestations of such reactions.