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Dust allergies can be caused by dust mites, animal dander or fungus. Learn about dust allergy symptoms in this article.

Can food allergies affect your behavior? Visit HowStuffWorks to learn about food allergies affecting behavior.

Can you develop gluten allergies later in life? Visit HowStuffWorks to learn more about developing gluten allergies later in life.

Skin allergy breakouts can be caused by foods, drugs or things you've touched. Learn how long skin allergy breakouts last in this article.

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

Do you know the reasons people start smoking? See our list of the 10 most common reasons people start smoking at HowStuffWorks.

There are a number of known triggers for hiccups. Learn whether hiccups can be a side effect of chemo in this article.

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

Hiccups can be long-term or short-term. Learn whether anesthesia can cause hiccups in this article.

Allergies are the body's overreaction to certain substances. Learn whether lavender plants can cause allergies in this article.

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