Food sensitivities and allergies are abundant in today's world. Serious allergies can lead to anaphylactic shock, but milder symptoms include an itchy throat and canker sores. Chocolate, coffee, strawberries, eggs, nuts, citrus fruits, tomatoes, and cheese are some of the more common culprits of canker sores in people sensitive to these foods. Soda, which contains high amounts of corn syrup and phosphoric acid, can also cause inflammation and canker sores.
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