Allergic inflammation is a response by the immune system to allergens, which are substances that can trigger allergic reactions. When the body encounters an allergen, such as pollen, dust mites, or pet dander, it mistakenly identifies it as harmful. This leads to the release of chemicals like histamine, causing symptoms such as swelling, redness, and itching in affected areas. This type of inflammation can occur in various parts of the body, including the skin, lungs, and nasal passages. Conditions like asthma, hay fever, and eczema are examples of allergic inflammation. Managing these conditions often involves avoiding allergens and using medications to reduce symptoms.