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Oral allergy syndrome


You already have watery eyes and runny nose, caused by allergies. Now, your mouth and throat are itchy. What’s going on here? Is this a new allergy symptom? Yes, only we “lucky” individuals who are sensitive to pollen also get to experience oral allergy syndrome (OAS).

Many seasonal allergy sufferers with OAS experience an itching, tingling, burning or swelling of the lips, tongue, throat or mouth after eating certain raw fruits, vegetables or tree nuts. OAS occurs in about one-third of those with allergies. Adults are affected more than children. Symptoms tend to be worse during spring and fall pollen seasons.

As I’m writing this, I’m scratching my itching throat and mouth with my tongue. During the grass pollen season, I get OAS symptoms after eating celery and watermelon. Other trigger foods include peaches, tomatoes, oranges, cantaloupe and honeydew.

OAS symptoms result from a cross reaction between the protein in certain raw foods and plant pollens. Basically, OAS works like this. You eat something like a bowl of strawberries or a ripe tomato. Your immune system recognizes a similarity between pollens in the air and what you’ve just eaten and produces an allergic reaction, kind of a combined pollen-food attack.

In most cases, reactions are mild and occur within minutes of eating the offending food, and last a few seconds or minutes. Sometimes, symptoms may last for hours. Other symptoms may include watery and itchy eyes, runny nose and sneezing. Approximately nine percent of individuals have more severe symptoms, including gastrointestinal problems (nausea, diarrhea) or skin allergies (contact dermatitis, hives, itching). About two percent may experience anaphylaxis, a life-threatening response.

When the trees are pollinating, I can’t eat some of my favorite fruits and veggies without having an itchy throat. Ragweed season produces more of the same.

Cooking or processing the problem foods, in some cases, eliminates the reaction. You also can try peeling a fruit or veggie to see if that helps. An antihistamine, taken 30-60 minutes before eating an offending food, may provide relief.

Cross reactions are more likely with the following food and plant combinations:
•Grasses: tomatoes, potatoes, peaches, melon, oranges, celery.
•Ragweed: melons, bananas, cucumbers, zucchini, dandelion, chamomile tea.
•Birch: potatoes, carrots, celery, parsnips, peppers, cherries, apple, pears, plums, peaches, kiwi, apricots, fennel, parsley, coriander, hazelnuts, almonds, walnuts.
•Alder: celery, pears, apples, cherries, peaches, parsley, almonds, hazelnuts.
•Mugwort (a weed): celery, carrots, various spices, apples, kiwis, fennel, peanuts, sunflower.
•Any of the above may react with: strawberries, raspberries, blueberries, other berries, citrus, grapes, mango, figs, peanuts, pineapple, pomegranate, watermelon.

The treatment is simple. Eat your fruits and veggies cooked instead of fresh. In addition, antihistamines and allergy shots may lessen symptoms.













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Content copyright © 2014 by Sheree Welshimer. All rights reserved.
This content was written by Sheree Welshimer. If you wish to use this content in any manner, you need written permission. Contact Sheree Welshimer for details.

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