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Disease Defense: Allergies

Related Article: Learn more about allergies.

Allergies occur when the immune system overreacts to a foreign substance, such as pollen, that enters the body.

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HowStuffWorks.com Videos: Allergies MRSS Feed

Coping With Spring Allergies and Asthma (4:39)

Watch this video about allergies on HowStuffWorks. Dr. Stefanie Ferreri explains how you can cope with spring allergies and asthma in this video from DWJTV.

Dangers of Food Allergies in Schools (1:00)

Watch this video about the dangers of food allergies in schools on HowStuffWorks. The number of food allergy incidences has doubled in the last 10 years to 12 million reported cases - that's 1 in 25 children. See how food allergies work and what... More »

Help for Allergy Sufferers (2:12)

Watch this video about new help for allergy sufferers on HowStuffWorks. Allergy rates are on the rise in the U.S. with about 50 million allergy sufferers. As a result, allergy sufferers are flocking to pharmacists, spending nearly $3 billion a year... More »

Disease Defense: Allergies (0:49)

Allergies occur when the immune system overreacts to a foreign substance, such as pollen, that enters the body.

Body Invaders: Dust Mites Exposed (3:54)

From the Discovery Health series "Body Invaders", dust mites are exposed as one of the most common sources of household allergens. Learn more about dust mites.

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Human Atlas: Asthma (1:11)

Asthma is a condition where the passageways leading to the lungs become inflamed and then the muscles constrict. Learn more about asthma in this video.

Human Atlas: Inhalers (1:25)

Common types of inhalers are: Metered Dose Inhalers, Small Volume Nebulizers, and Dry Powder Inhalers. Learn more about inhalers in this video.

Human Atlas: Allergies (1:26)

An allergy occurs when the body is introduced to substances it cannot tolerate. Learn more about allergies in this video.

Human Atlas: Antihistamines (1:20)

Antihistamines are drugs that can protect allergy sufferers from the effects of histamines. Learn more about antihistamines in this video.

Body Invaders: Dust Mites Exposed (3:54)

From the Discovery Health series "Body Invaders", dust mites are exposed as one of the most common sources of household allergens. Learn more about dust mites.

Body Invaders: Allergies and Dust Mites (2:17)

Allergies can be caused by everything from pollen to dust mites, and they can be detected with a simple skin test. Learn about allergy tests in this video from Discovery Health's "Body Invaders."

Disease Defense: Allergies (0:49)

Allergies occur when the immune system overreacts to a foreign substance, such as pollen, that enters the body.