What causes the development of oral allergy syndrome in people?

Cross reaction. Oral allergy syndrome occurs in people with pollen allergies (sometimes dust mite allergies), when a protein in the food they eat cross reacts with a protein in the pollen to which they are allergic, resulting usually in mouth and throat itching, .
Pollen allergy. Severe allergy to various pollens and the cross-sensitivity between the pollen and the protein epitopes in raw fruits/veggies cause oral allergy syndrome. Therefore, if you are very allergic to spring tree pollen (birch), you may experience oral allergy symptoms after eating raw carrots, apples, peaches, plums and cherries.

Related Questions

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...

Can oral allergy syndrome cause voice hoarsenss?

Oral allergy synd. Yes, but it's not common. Many patients with this problem do not require specific treatment, because the symptoms are mild. Sometimes if they want to eat the fruit, they pre-medicate themselves with antihistamines. If the reactions are really bothersome or dangerous, with throat closing and hoarseness, the food should be avoided as best possible, and epi pen carried. Read more...

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...

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...

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...

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...

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...