News tagged with allergic reactions

Related topics: asthma

Kids with food allergies can fall through the cracks

More can be done to properly manage the care of American children with food allergies, especially when it comes to diagnostic testing and recognizing non-visual symptoms of severe allergic reactions, according to a new Northwestern ...

Sep 13, 2012
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Allergy to moistened wipes rising

More and more people are developing an itchy, painful rash in an effort to stay clean. A dermatologist at The Ohio State University Wexner Medical Center says a preservative in many types of pre-moistened wipes is linked ...

Mar 04, 2014
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Peanuts don't panic parents as much as milk and eggs

It's tough being the parent of a child with food allergies. Constant vigilance is needed for everything your child eats, when a single food item containing a hidden ingredient can be fatal. Although worry is a factor for ...

Jun 26, 2014
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You can have a food allergy, and eat it too

Have food allergies? If you answered yes, you know the best way to prevent a severe allergic reaction is to totally avoid the offending food. But according to a presentation at the Annual Scientific Meeting of the American ...

Nov 08, 2013
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Taking the sting out of insect-sting allergies

(Medical Xpress)—Certain people with a history of systemic allergic reactions to insect stings are likely to benefit from immunotherapy to prevent life-threatening anaphylaxis and should, at the very least, ...

Apr 11, 2014
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Allergy

Allergy is a disorder of the immune system often also referred to as atopy. Allergic reactions occur to normally harmless environmental substances known as allergens; these reactions are acquired, predictable, and rapid. Strictly, allergy is one of four forms of hypersensitivity and is called type I (or immediate) hypersensitivity. It is characterized by excessive activation of certain white blood cells called mast cells and basophils by a type of antibody known as IgE, resulting in an extreme inflammatory response. Common allergic reactions include eczema, hives, hay fever, asthma, food allergies, and reactions to the venom of stinging insects such as wasps and bees.

Mild allergies like hay fever are highly prevalent in the human population and cause symptoms such as allergic conjunctivitis, itchiness, and runny nose. Allergies can play a major role in conditions such as asthma. In some people, severe allergies to environmental or dietary allergens or to medication may result in life-threatening anaphylactic reactions and potentially death.

A variety of tests now exist to diagnose allergic conditions; these include testing the skin for responses to known allergens or analyzing the blood for the presence and levels of allergen-specific IgE. Treatments for allergies include allergen avoidance, use of anti-histamines, steroids or other oral medications, immunotherapy to desensitize the response to allergen, and targeted therapy.

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