Over 200,000 emergency room visits every year are caused by allergic reactions to food. An estimated 15 million Americans have some form of food allergy, the symptoms of which can vary from an itchy mouth to potentially deadly anaphylaxis. Other signs of an allergic reaction include rashes, breathing issues, intestinal discomfort, and circulation problems.
"Allergies to anything can occur at any age," says Dr. Scott H. Sicherer, author of Food Allergies: A Complete Guide to Eating When Your Life Depends on It. So when you suspect you are having an allergic reaction to something you ate – even if you've eaten it before without issue – you should talk with your doctor. If you find you aren't sure what is causing an allergy, look to the ten foods listed here. After all, some 90 percent of allergies are caused by just a handful of products – milk, eggs, peanut, tree nuts, fish, shellfish, wheat, and soy.
Tree nut allergy is really a category of allergies. Just because someone is allergic to one type of tree nut, doesn't necessarily mean they are allergic to all of them. But there is an increased chance that they are allergic to more than one. Examples of tree nuts include walnuts, almonds, hazelnuts, cashews, pistachios, and Brazil nuts. Children with tree nut allergies are not likely to outgrow them and are generally advised to also stay away from peanuts to avoid cross-contamination.
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