Food Allergy Information

Concerned about food allergies? Get the basic information about food allergies, including symptoms, related health conditions and the most common foods that trigger allergic reactions.

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A new study showed that about 10 percent of Americans who thought they had food allergies actually had food intolerance issues. So what's the difference?

By Dave Roos

Nearly half of all U.S. adults who have food allergies developed at least one of them during adulthood.

By Jesslyn Shields

It's called oral allergy syndrome, and it's caused when the immune system freaks out and overreacts to allergens.

By Shelley Danzy

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Food allergies can affect your behavior, causing hyperactivity, depression, anxiety and more. Learn whether food allergies can affect your behavior in this article.

By HowStuffWorks.com Contributors

People often confuse food allergies and food intolerance. Learn the difference between food allergies and food intolerance in this article.

By HowStuffWorks.com Contributors

Anaphylaxis is a life-threatening condition that requires immediate medical care. Learn whether food allergies can cause anaphylaxis in this article.

By HowStuffWorks.com Contributors

Some symptoms of food allergies are reactions of the skin and respiratory or gastrointestinal systems. Learn about symptoms of food allergies in this article.

By HowStuffWorks.com Contributors

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There's an emotional impact of food allergies for adult and child allergy sufferers and their families. Learn about the emotional impact of food allergies in this article.

By HowStuffWorks.com Contributors

No food can cause an allergic reaction the first time it's ingested. However, severe reactions can occur any time afterward. See some of the most common foods that trigger allergies.

By HowStuffWorks.com Contributors

Food allergies are responsible for a wide variety of symptoms. Learn whether there are food allergies that cause earaches in this article.

By HowStuffWorks.com Contributors

Food allergies can cause a variety of symptoms. Learn whether any food allergies cause edema in this article.

By HowStuffWorks.com Contributors

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Food allergies can cause acne, among other skin conditions. Find out whether food allergies can cause acne in this article.

By HowStuffWorks.com Contributors

Food allergies can cause asthma, among other respiratory symptoms. Find out whether food allergies can cause asthma in this article.

By HowStuffWorks.com Contributors

Sore gums can be caused by any number of factors. Learn whether food allergies can cause sore gums in this article.

By HowStuffWorks.com Contributors

Even if you don't want to speak up, the safest way to deal with food allergies in the workplace is to tell your boss and colleagues about your allergies. Learn how to deal with food allergies in the workplace in this article.

By HowStuffWorks.com Contributors

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A chemical called histamine causes most allergic symptoms. Learn whether food allergies can cause a rash in this article.

By HowStuffWorks.com Contributors

Food allergies are the result of a mistake by your immune system. Learn whether food allergies can cause swelling in this article.

By HowStuffWorks.com Contributors

Of the many things parents are encouraged to freak out about, the fear that a peanut will cross your toddler's lips is way up there. Just how much fear is necessary, and how much is due to the 24-hour news cycle?

By Tom Scheve

Food allergies are a hypersensitivity by the immune system to certain foods. Allergic reactions can range from tingling lips to abdominal cramps to even shock. Learn more about food allergies.

By Linnea Lundgren