21 doctors weighed in:
What's the difference between a food allergy and "oral allergy syndrome"?
21 doctors weighed in

Dr. Luis Matos
Internal Medicine - Allergy & Immunology
9 doctors agree
In brief: Cause of Oral allerg
Oas is seen when people with high level of ragweed pollen allergy feel itchy mouth and throat when they eat melons, (watermelon, cantaloupe, honeydew and rarely cucumbers).
Also, birch pollen allergy triggers this when eating peach family fruits ( cherries, apricots, nectarines, etc...), apples and pears. Diagnosis is made by positive tests to the pollen and history. Pollen immunotherapy may help.

In brief: Cause of Oral allerg
Oas is seen when people with high level of ragweed pollen allergy feel itchy mouth and throat when they eat melons, (watermelon, cantaloupe, honeydew and rarely cucumbers).
Also, birch pollen allergy triggers this when eating peach family fruits ( cherries, apricots, nectarines, etc...), apples and pears. Diagnosis is made by positive tests to the pollen and history. Pollen immunotherapy may help.
Dr. Luis Matos
Dr. Luis Matos
Thank
Dr. Maziar Rezvani
Internal Medicine - Allergy & Immunology
4 doctors agree
In brief: OAS is food allergy
Oas is the most common and benign type of food allergy.
It occurs when proteins which are contained in pollens are shared with fruits/vegetables/grains/legumes. Ingestion of the food induces oral pruritis and in rare occasions, rhinitis and angioedema but it rarely progresses to systemic symptoms. Fortunately, these labile proteins are degraded by your stomach pH after ingestion.

In brief: OAS is food allergy
Oas is the most common and benign type of food allergy.
It occurs when proteins which are contained in pollens are shared with fruits/vegetables/grains/legumes. Ingestion of the food induces oral pruritis and in rare occasions, rhinitis and angioedema but it rarely progresses to systemic symptoms. Fortunately, these labile proteins are degraded by your stomach pH after ingestion.
Dr. Maziar Rezvani
Dr. Maziar Rezvani
Thank
Dr. Stevan Cordas
Internal Medicine
3 doctors agree
In brief: Food allergy
A food allergy in adults is uncommon.
It can be verifed by skintesting and rast testingmin most cases but not all cases since you may be allergic to what the food becomes after digestion. An oral allergy syndrome is probably referring to food intolerance which is not a classic allergy and may not show up with such tests. It has many causes and is a complex subject but is more common in adults.

In brief: Food allergy
A food allergy in adults is uncommon.
It can be verifed by skintesting and rast testingmin most cases but not all cases since you may be allergic to what the food becomes after digestion. An oral allergy syndrome is probably referring to food intolerance which is not a classic allergy and may not show up with such tests. It has many causes and is a complex subject but is more common in adults.
Dr. Stevan Cordas
Dr. Stevan Cordas
Thank
Dr. Shaym Puppala
Internal Medicine
3 doctors agree
In brief: Type of food allergy
Oral allergy syndrome (oas) is a type of food allergy, with symptoms limited to the mouth and throat and prevented by cooking all food.
There are other types of food allergy, some of which cause gastrointestinal (stomach/bowel) problems such as diarrhea or pain, or a rash, or watery eyes/nose, or even swelling of the throat and/or other life-threatening problems like very low blood pressure.

In brief: Type of food allergy
Oral allergy syndrome (oas) is a type of food allergy, with symptoms limited to the mouth and throat and prevented by cooking all food.
There are other types of food allergy, some of which cause gastrointestinal (stomach/bowel) problems such as diarrhea or pain, or a rash, or watery eyes/nose, or even swelling of the throat and/or other life-threatening problems like very low blood pressure.
Dr. Shaym Puppala
Dr. Shaym Puppala
Thank
4 comments
Dr. Shaym Puppala
In all cases, foods causing wheezing must be avoided at all costs.
Dr. Shaym Puppala
I recommend talking with her primary care physician, who can answer questions specific to her case.
Get help from a real doctor now
Dr. Marsha Davis
Board Certified, Internal Medicine
24 years in practice
67M people helped
Continue
107,000 doctors available
Read more answers from doctors