7. Shellfish
Just like peanuts, shellfish is one of the most common food allergies. It sends more people to the emergency room than any other food, according to the American College of Allergy, Asthma & Immunology. If your mouth itches, you develop hives, or a stomachache after eating crab, lobster, and other shellfish, you may be one of the nearly 7 million Americans who suffer with the condition. Symptoms include difficulty breathing, vomiting, and can even lead to death if untreated.
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