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.


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Why Severe Allergies Can Suddenly Pop Up in Adulthood

Your body never freaked out before when you were stung by a bee. And yet one day, you have an anaphylactic reaction to a bee sting. What's the deal?

Can You Be Allergic to Your City?

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.

Nothing to Sneeze at: Allergies May Affect the Brain

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.

Marked at Birth: Your Birth Month, Allergies and DNA Are Linked

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.

Now You See Them, Now You Don't: The Trouble With Allergies

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

Is it possible to be allergic to your own blood?

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.

Is it possible to make yourself allergic to something?

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?

5 Common Allergens

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

3 Things Making Your Child's Allergies Worse (and How to Fix Them)

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.

Prevent Allergy Symptoms While Traveling

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

5 Signs That Your Child Has Allergies

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.

What are some possible causes of anaphylaxis?

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

What are some signs of anaphylaxis in children?

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

What are some symptoms of anaphylaxis?

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

Watery Eyes? 5 Things You Didn't Know About Eye Allergies

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?

What are some red dye allergy symptoms?

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

What are some winter allergy symptoms?

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

What are some cigarette allergy symptoms?

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

What are some codeine allergy symptoms?

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

Do allergies cause nasal congestion?

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

What are some allergy-induced asthma symptoms?

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

What are some avocado allergy symptoms?

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

Can allergies cause post-nasal drip?

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

Can high blood pressure cause eye allergies?

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.

Can swollen eyes be a sign of eye allergies?

Eye allergies are common in springtime or as a result of indoor allergens. Learn if swollen eyes can be a sign of eye allergies in this article.