Allergic Rhinitis – Symptoms and Treatment

Definition of Allergic Rhinitis Allergic Rhinitis is a hypersensitivity reaction to inhaled allergens – also called seasonal rhinitis or hay fever, affects the mucous membranes inside the nose (nasal mucosa). Allergic rhinitis affects about 40 million adults in the United States, making it one of the most common hypersensitivity reactions. The condition tends to develop in childhood and […]

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Allergy Definition and Symptoms

Allergy definition Allergy is an abnormal sensitivity to an ordinarily harmless substance, called an allergen, that produces a hypersensitivity reaction (allergic reaction) in response to the immune system’s detection of the substance’s presence. A person can have an allergy to nearly any substance. Though researchers understand the mechanisms of hypersensitivity reaction, they do not know what causes the immune system to […]

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Allergy Testing

Allergy Testing Definition and Information Allergy Testing is a diagnostic procedures to determine the allergens responsible for hypersensitivity reaction. The most specific allergy test is the allergy skin test, also called a scratch test or a patch test. For this test, the allergist uses the inside of the arm or a section of the back to expose the […]

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Anaphylaxis – Definition, Symptoms and Treatment

Definition of Anaphylaxis Anaphylaxis is a severe hypersensitivity reaction (allergic reaction) in which the tissues of the throat swell, preventing air from getting to the lungs. Anaphylaxis, also called anaphylactic shock, is a type I hypersensitivity reaction that often develops rapidly, within minutes to an hour of exposure to the allergen. Hives, angioedema, and airway spasms are the most […]

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Angioedema – Definition, Causes, Symptoms and Treatment

Definition of Angioedema A hypersensitivity reaction (allergic reaction) that produces swelling and fluid accumulation beneath the surface of the skin, similar in appearance to urticaria (hives). Occurs in response to histamine release and typically affects the face, especially around the eyes and lips, and can be life threatening when it is severe or if it develops in the throat. Swelling in […]

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Atopy – Definition, Treatment and Atopic Attack

Definition of Atopy A genetically predisposed hypersensitivity reaction. Atopy is typically chronic. The most common forms of atopy are atopic: Asthma, which affects the airways (bronchi) Dermatitis, which affects the skin Rhinitis, which affects the nasal passages (nose) Conjunctivitis, which affects the membranes that line the eyelids (conjunctiva) and the sclera (white) of the eye Symptoms, Treatment […]

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Desensitization Therapy and Allergies

Desensitization Therapy A therapeutic method in which gradual exposure to an allergen builds up the body’s tolerance for the allergen, diminishing the immune response to encountering it. immunoglobulin E (IgE) is primarily responsible for the symptoms associated with type I hypersensitivity reaction (allergic reaction), initiating the release of histamines, leukotrienes, and prostaglandins. These substances induce inflammation (swelling), itching, sneezing, coughing, and other physiologic responses that […]

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Food Allergies – Symptoms, Common and Treatment

Food Allergies Definition Hypersensitivity reactions to consumed foods. Food allergies affect about nine million Americans, two thirds of them children under the age of six. Allergies to peanuts, milk, wheat, shellfish, strawberries, and eggs are among the most common. Some people are allergic to preservatives or other substances used to prepare foods. Children tend to […]

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Hypersensitivity Reaction – Types, Symptoms, Treatment and Allergy

Hypersensitivity Reaction Definition A symptomatic interaction between antibodies and allergens that causes an exaggerated and harmful response in the body, commonly called an allergic reaction. Hypersensitivity reactions range from mild to life threatening in severity and symptoms. Anaphylaxis, the most severe hypersensitivity reaction, is a life-threatening emergency that requires immediate medical attention. There are four […]

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Living With Allergies and Outdoor/Indoor Allergens

Living with Allergies – Introduction About 50 million Americans live with allergies-to pollens, animal danders, latex, fragrances, foods, drugs, and other substances-that cause them to alter their lifestyles. Most people can reduce exposure to allergens enough to lessen symptoms. Outdoor Allergens The primary outdoor allergens are pollens and molds. Pollen is the powdery and often […]

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