Allergy Basics

There are many types of allergies and allergic reactions. Get a basic overview of allergies, your immune system and why some people are more susceptible to allergies than others.


If you're moving from one city to another, pack some extra tissues because it's true: Seasonal allergies can flare up when you relocate and are exposed to new allergens.

There may be more going on with your body than just itchy eyes and a runny nose when you're dealing with seasonal allergies, a small new study finds.

Although scientists knew that birth season affected people's allergy risk, they didn’t know why this happened. A new study gets us one step closer.

The sixth-leading cause of chronic illness in the U.S. remains maddeningly difficult to figure out.

With blood pumping through your body every second of the day, it seems unthinkable that this life-giving substance could be an allergen. For some people, it's not weird science — it's reality.

Allergy symptoms like itchy, watery eyes aren't any fun to deal with. Could you be causing your own pain with certain patterns of behavior?

Can you identify household and common allergens? Recognize common allergens and learn how to deal with their side effects.

Pollens, dust mites, pet allergens ... do you know what is bothering your allergic child? See common allergens and how to reduce your child's exposure to them.

Learn how to control your allergy symptoms while traveling. No more sneezing, watery eyes and runny nose on your trips!

If your child seems to get ill more often than average, maybe it is time to ask if they suffer from allergies. See these seven signs that your child may be suffering from allergies.

Anaphylaxis is a life-threatening condition typically caused by allergies. Learn about some possible causes of anaphylaxis in this article.

Anaphylaxis is a dangerous condition that's normally the result of an allergic reaction. Learn some signs of anaphylaxis in children in this article.

Anaphylaxis is normally the result of an allergic reaction, and it can be deadly. Learn some symptoms of anaphylaxis in this article.

If you're one of the many sufferers of any eye allergy, you know how uncomfortable they can be. What don't you know about eye allergies that just may help?

Anaphylaxis is a life-threatening condition usually brought about by allergies. Learn what exercise-induced anaphylaxis is in this article.

Red food coloring can be from an artificial source or a natural source. Learn about red dye allergy symptoms in this article.

Winter allergy symptoms often mirror flu symptoms. Find out more about winter allergies from this article.

Rarely, people are allergic to tobacco plants. Learn about cigarette allergy symptoms in this article.

Codeine is a pain medication with a variety of side effects. Learn about codeine allergy symptoms in this article.

Nickel allergies cause allergic contact dermatitis. Learn about nickel allergy symptoms in this article.

Nasal congestion is one symptom caused by an allergy. Find out how allergies cause nasal congestion from this article.

About 70 percent of asthma sufferers also have allergies. Learn about allergy-induced asthma symptoms in this article.

An avocado allergy is much like any other food allergy. Learn about avocado allergy symptoms in this article.

Allergies can cause a wide range of symptoms. Learn whether allergies can cause post-nasal drip in this article.

High blood pressure does not always have symptoms until the condition becomes severe. Learn if high blood pressure can cause eye allergies in this article.