Hay Fever (Allergic Rhinitis)

What is allergic rhinitis? Allergic rhinitis (also called “hay fever”) happens when you breathe in something you are allergic to, and the inside of your nose becomes inflammed or swollen. Allergic rhinitis affects 40 million people in the United States. What are the signs and...
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Immunotherapy

What is Immunotherapy? (Also known as allergy shots) Immunotherapy (allergy shots) is a treatment used to alleviate allergic symptoms of hay fever or asthma by administering injections of substances called allergens, such as pollens, mold spores, dust mites, animal dander, or...
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Hives (Urticaria)

Hives are red and sometimes itchy bumps on your skin. An allergic reaction to a drug or food usually causes them. Allergic reactions cause your body to release chemicals that can make your skin swell up in hives. People who have other allergies are more likely to get hives than...
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Anaphylaxis

A potentially life-threatening reaction What is anaphylaxis? Anaphylaxis (an-a-fi-LAK-sis) is a serious allergic reaction that can cause death. It can happen in people who have allergies or asthma, and it may be caused by a number of normally harmless things called allergens....
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Food Allergy

Food allergy is an abnormal response to a food triggered by the body’s immune system. Food allergy refers to a particular type of response of the immune system in which the body produces what is called an allergic, or IgE, antibody to a food. (IgE, or immunoglobulin E, is a type...
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