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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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Allergy Basics

Allergies are so commonplace that we often do not stop to think of how they occur. Those watery eyes and runny noses happen because your body rejects otherwise harmless substances.


Can You Be Allergic to Your City?

Moving from one city to another can actually trigger seasonal allergies in many people. HowStuffWorks explains the details behind why. See more »

Nothing to Sneeze at: Allergies May Affect the Brain

Seasonal allergies are a huge hassle, but the sneezing and watery eyes are only part of the story of how the body reacts to them. See more »

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

Scientists have found a link between DNA and allergies. HowStuffWorks Now explores the link between your birth month and your allergies. See more »

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. Learn more about allergies at HowStuffWorks Now. See more »

Is it possible to be allergic to your own blood?

It is possible to be allergic to your own blood. Learn more about the condition at HowStuffWorks. See more »

Is it possible to make yourself allergic to something?

Many allergies develop later in life. Learn whether it is possible to make yourself allergic to something at HowStuffWorks. See more »

5 Common Allergens

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

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

Some things can make your child's allergies worse, but can also be easily avoided. See three things that can make your child's allergies worse. See more »

Prevent Allergy Symptoms While Traveling

Traveling to a new place can present our senses with a whole host of allergy triggers. Follow our tips for reducing your allergies while traveling. See more »

5 Signs That Your Child Has Allergies

Do you know the signs of allergies? See these five signs that your child has allergies to get information and start treatment. See more »