Allergies can come on at any age even with no past history. If you feel that this burning is from an allergic reaction, you may have to request allergy testing. Did it only happen the one time or several times with the same thing? Have you noticed a pattern? Did you eat anything real salty or acidic?
Food allergies and food intolerances are two different birds. If one is allergic to foods, the typical symptoms are swelling of the throat and/or tongue, rashes or hives, migraines, basically anything that is out of the GI tract. Food intolerances mainly deal with all things internal such as bloating, indigestion, diarrhea, vomiting etc. A burning tongue can be a sign of a food allergy but if it only happened once, it may have been something else. If it's reoccuring, then it's time to step up your pursuit to find the cause. Not everyone with one food allergie will have dangerous allergic reactions to foods. For example, I have an allergy to strawberries and hazel nuts. I develop a rash with strawberries and I itch insanely from hazelnuts but that is as far as my allergies have gone.
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