Do you sense any tingling or itching sensation in your mouth after eating particular foods? Encountering such irritations in the mouth and throat after consuming certain fruits and raw vegetables occurs due to Oral Allergy Syndrome. Such food allergies are primarily triggered by the immune system when it detects even a tiny amount of allergens in the foods.
What is meant by Oral Allergy Syndrome?
Oral Allergy Syndrome (OAS) is a kind of food allergy and it is commonly seen in people with seasonal pollen allergies. The proteins in some fruits and vegetables are similar to the pollens in particular trees. It confuses our immune system to conclude if the particular fruits have proteins or pollens.
Hence the immune system exhibits allergic responses like burning sensations in lips, throat, ear canal, stomach, etc. As many people are not aware of this condition, they thought their bodies cannot tolerate particular herbs. It is highly seen in teenagers and adults. Luckily, its discomforts are mild and not chronic.
Is Oral Allergy Syndrome Dangerous?
Most of the time, no. It’s annoying, not life-threatening. But if you’re reacting to nuts or your throat starts to swell, that’s not something to brush off. Get help right away if breathing gets hard or symptoms escalate.
How Long Does Oral Allergy Syndrome Last?
Anywhere from a few minutes to about an hour. If you swallow the trigger food, symptoms might stick around longer. Cooking or peeling usually breaks down the proteins enough to avoid a reaction.
What does it mean if the discomforts are severe?
As mentioned earlier, OAS is highly seen in people suffering from pollen allergies. It prompts some sufferers to encounter severe difficulties or adverse side effects like
- Diarrhea
- Swelling in oral tissues
- Shortness of breath
- Tightness in throat
- Wheezing
- Low blood pressure
Hence it is important to avoid certain eatables if you have seasonal pollen allergies.
What are the fruits and vegetables that trigger oral allergy syndrome?
Alder, Birch, Ragweed, Mugwort, Timothy grass, and Orchard grass pollens are responsible for OAS. Eating some raw vegetables will cross-react the pollen allergens in the sufferer’s body and would cause many discomforts.
- If you have a ragweed allergy, you should avoid banana, cucumber, waatermelon, honeydew, and sunflower seeds.
- If you have birch allergy, you should stop consuming apple, celery, carrots, cherries, kiwi, peaches, and coriander.
- If you have grass allergy, it is better to avoid citric fruits like tomatoes, oranges.
- If you are allergic to mugwort, then avoid apples, broccoli, cabbage, carrots, coriander, celery, peanuts, bell pepper, and black pepper to avoid OAS.
OAS Cross‑Reactivity Chart

How can you diagnose Oral Allergy Syndrome?
Apart from irritations in oral tissues, OAS and other seasonal allergies can be confirmed with skin tests. During diagnosis, allergists look whether a sufferer has cross-reaction to particular foods. If they found, they would recommend the foods to avoid for your well-being.
How to Treat Oral Allergy Syndrome
Avoid the raw foods that set you off, especially during allergy season. Cook, bake, or peel them if you can’t give them up. If you still get symptoms, an antihistamine should do the trick. For chronic cases, talk to a specialist—immunotherapy might be on the table.
Will avoiding such foods prevent Oral Allergy Syndrome?
Cutting down the particular foods prevents the cross-reaction thereby the oral difficulties can be prevented to a great extent. In most cases, taking these foods after being cooked or pressurized does not cause any discomfort.
It is because the allergens will go down smoothly when you cook a vegetable. Likely, peeling off a fruit’s skin is also helpful in expelling the allergens.
In contrast, it is not helpful in all cases. In such circumstances, you should give your favorite fruits or vegetables and even dishes prepared with them to avert the allergic reaction exhibited as a tingling or burning sensation in your mouth.
Takeaway
Oral Allergy Syndrome isn’t usually dangerous, but it can be irritating. Know your triggers, cook your produce, and don’t ignore symptoms that go beyond a mild itch. When in doubt, talk to your allergist. Contact Surya Dental Care for getting rid of your allergies.




