allergic reaction

**allergic reaction**

An allergic reaction occurs when the immune system responds aggressively to a normally harmless substance, known as an allergen. Common allergens include pollen, certain foods, insect stings, and pet dander. Symptoms can range from mild, such as itching and sneezing, to severe, including swelling, difficulty breathing, and anaphylaxis. Understanding allergic reactions is crucial for effective management and treatment, often involving avoidance of triggers, antihistamines, or emergency intervention in severe cases. Use this tag for posts related to allergy symptoms, causes, prevention, and treatment options.