Allergic Reaction:
Noun
1. A physiological response of the immune system to a substance that is normally harmless, resulting in symptoms ranging from mild to severe. It occurs when the immune system mistakenly identifies the substance, known as an allergen, as harmful and releases chemicals, such as histamine, to defend the body. Common allergens include pollen, certain foods, medications, insect stings, and animal dander.
2. Symptoms of an allergic reaction may include itching, hives, swelling, redness, sneezing, runny nose, watery eyes, coughing, wheezing, difficulty breathing, abdominal pain, nausea, vomiting, diarrhea, dizziness, and in severe cases, anaphylaxis. The severity and type of symptoms can vary depending on the individual and the allergen involved.
3. Treatment for allergic reactions may involve avoiding the allergen, taking antihistamines or other medications to relieve symptoms, and in severe cases, administering epinephrine through an auto-injector. It is important for individuals with known allergies to carry appropriate medication and seek immediate medical attention if experiencing a severe allergic reaction.
An allergic reaction is a medical condition in which the body’s immune system overreacts to a substance, resulting in symptoms such as hives, itching, swelling, difficulty breathing, and in severe cases, anaphylaxis. Allergic reactions can be triggered by a wide range of substances, including food, medications, insect stings, and environmental allergens. In some cases, an allergic reaction may be considered a medical emergency and require immediate treatment. Individuals with known allergies are advised to carry an epinephrine auto-injector and seek medical attention if they experience symptoms of an allergic reaction.
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This glossary post was last updated: 29th March 2024.
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