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Doctor insights on: Oral Allergy Syndrome

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Oral allergy syndrome is what?

Oral allergy syndrome is what?

OAS: This is a disorder related to cross reactive proteins in the fresh or raw fruit of vegetables you eat. For example, fresh apple causes itch, tingle, and possible swelling in the mouth, but apple pie, apple sauce, apple crumble cause no symptoms. It is because you have seasonal pollen allergies. Think where the fruit or veggie grows and it can give you a clue to what pollens you are allergic to. ...Read more

Dr. John Chiu
2,491 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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What is oral allergy syndrome ?

What is oral allergy syndrome ?

Pollen allergy: Oas occurs in highly allergic people whose allergic antibodies to pollen cross-react with certain raw fruits and vegetables. The most common symptoms are itching in the mouth when birch-allergic people eat apples, or ragweed-allergic people eat cantaloupe. Cooking the fruits and vegetables is effective, but medications don't prevent the symptoms - the only treatment for that is allergy shots. ...Read more

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What's an oral allergy syndrome?

What's an oral allergy syndrome?

Food allergy: Oral allergy syndrome is the clinical syndrome seen in patients with pollen allergy who get oral symptoms to some fresh fruits and vegetables. Typically it is a cross reactive allergen in the pollens and fruits. ...Read more

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Is oral allergy syndrome dangerous?

Is oral allergy syndrome dangerous?

Orl allergy syndrome: Usually, patients with oral allergy syndrome have itchy symptoms locally of the lips, tongue and sometimes the throat, and it is not dangerous. When the symptoms are more severe and cause hoarseness or real airway obstruction, we tend to call it anaphylaxis. Severity affects the description and the two conditions can overlap. Anaphylaxis is a broader term & includes many causes and sx patterns. ...Read more

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Fill me in on oral allergy syndrome?

Fill me in on oral allergy syndrome?

Fresh food allergy: Oral allergy syndrome is due to allergy to allergens in fresh fruit and vegetables. In most cases skin testing will be positive only when testing with fresh food, not with cooked foods or medical extracts. Symptoms are usually limited to itchy mouth and throat, rarely progressing to more severe reactions. Some reactions are due to crossreactivity between pollen such as ragweed and cantaloupe. ...Read more

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How do you treat someone who has oral allergy syndrome?

How do you treat someone who has oral allergy syndrome?

No treatment: Oral allergy syndrome is not treatable. The only option is to avoid the food that triggers the reaction, although cooking the food can eliminate the reaction. ...Read more

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What causes the development of an oral allergy syndrome?

What causes the development of an oral allergy syndrome?

OAS: This is a disorder related to cross reactive proteins in the fresh or raw fruit of vegetables you eat. For example, fresh apple causes itch, tingle, and possible swelling in the mouth, but apple pie, apple sauce, apple crumble cause no symptoms. It is because you have seasonal pollen allergies. Think where the fruit or veggie grows and it can give you a clue to what pollens you are allergic to. ...Read more

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I have oral allergy syndrome, is there a way to describe it?

I have oral allergy syndrome, is there a way to describe it?

OAS: This is a disorder related to cross reactive proteins in the fresh or raw fruit of vegetables you eat. For example, fresh apple causes itch, tingle, and possible swelling in the mouth, but apple pie, apple sauce, apple crumble cause no symptoms. It is because you have seasonal pollen allergies. Think where the fruit or veggie grows and it can give you a clue to what pollens you are allergic to. ...Read more

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How do you eat healthily if you have an oral allergy syndrome?

Depends on allergens: The food that causes oral allergy syndrome varies with individuals and what pollen they are allergic to. In most cases, cooking the vegetables or fruits will destroy the protein causing the reaction, and the food can be eaten that way. ...Read more

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