What's the difference between a food allergy and "oral allergy syndrome"?

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.
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.
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.
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.

Related Questions

What is the difference between food allergies and sensitivities?

Different. Food allergy refers to an ige mediated reaction to a food that could result in itchiness, hives, lip or tongue swelling, asthma and rarely death. Food intolerance is not ige mediated food allergy and could include lactose intolerance where one lacks the enzyme lactase that is needed to digests lactose -- the sugar in milk. Read more...

What is the difference between food allergies and just food sensitivities?

Allergy. A food allergy is based on an allergic immune response where your body creates an antibody against that food and causes you to have hives, swelling, severe cramps and some case anaphylaxis. A food sensitivity varies in its symptoms and is not based on a specific immune response. Read more...

What is the difference between seborrheic dermatitis and atopic dermatitis? Food allergies relation? Is there a way my dermatologist mistaken it?

Atopic dermatitis. Both are easily diagnosed especially by a dermatologist and food allergies are a rare consideration. Read more...
SEBORRHEIC VS ATOPIC. LIKE FRUIT, THEY ARE BOTH RELATED. THEY ARE SKIN PROBLEMS. BUT THEY ARE COMPLETELY DIFFERENT IN THAT ONE (ATOPIC DERMATITIS) IS USUALLY INHERITED AND EXTREMELY ITCHY. OCCURS IN THE BENDS OF THE KNEES AND ELBOWS. AND OTHER AREAS. SEBORRHEIC DERMATITIS OCCURS ON THE SCALP WITH FLAKING AND ITCHING, AND SOMETIMES ON THE CHEST. ATOPICS CAN PRESENT WITH THIS AS EARLY AS 2 OR 3 MONTHS OF AGE AND CAN LAST. Read more...