An allergy is an exaggerated immune response or reaction to substances that are generally not harmful.

Get the facts about allergic reactions, causes, allergy types (food, dust, mold, seasonal), symptoms and signs (skin rash, itching, red bumps, sneezing).

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An allergy is an overcompensation of the body’s immune system when confronted with the protein of a food, a drug (such as penicillin), a bee sting or an airborne ...

Your eyes itch, your nose is running, you're sneezing, and you're covered in hives. The enemy known as allergies has struck again.

An allergy is an exaggerated immune response or reaction to substances that are generally not harmful. Allergies are pretty common. Both genes and ...

Up to 50 million Americans, including millions of kids, have an allergy. Find out how allergies are diagnosed and how to keep them under control.

A food allergy is an exaggerated immune response triggered by eggs, peanuts, milk, or some other specific food.

Allergies affect nearly 20% of Americans. Here you'll find in-depth allergy information including treatments

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Serious allergies to penicillin are common, with about 10 percent of people reporting an allergy. However, most people who believe they are allergic can take ...

A food allergy is an adverse immune response to a food protein. They are distinct from other adverse responses to food, such as food intolerance, pharmacological ...

An 'allergy' is a hypersensitivity to a particular substance that is normally harmless to most people. These allergy-causing substances are known as...

Sneezing, difficulty breathing, cramps, and vomiting–all are allergy symptoms. Learn the types of allergies, specific allergy symptoms, and emergency warning signs.

An allergy is a reaction of your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one ...

Get prescription-strength allergy relief from indoor and outdoor allergies—without a prescription. Allegra, now over-the-counter (OTC), provides fast,* 24-hour ...