(An important exception is tree nuts and peanuts, which still typically cause symptoms even when roasted, in patients with true food allergies to them.).This is because heating the food changes the allergens that cause the symptoms. For example, if you have symptoms after eating raw apples, you should be able to eat apple pie or drink apple juice without a problem. Cooking or baking the food will significantly reduce symptoms.Peeling the fruit may reduce symptoms since the allergenic protein is often concentrated in the skin.You may be able to continue eating the foods, but you should first discuss it with your doctor. Discuss your symptoms with your doctor, and develop a plan.What to do if you have oral allergy syndrome: Your doctor can diagnose oral allergy syndrome by reviewing your clinical history and, in some cases, conducting skin prick tests and oral food challenges with raw fruit or vegetables. Vegetables (potato, tomato, Swiss chard).Spices (parsley, caraway, fennel, coriander, aniseed, black pepper, garlic, mustard)įoods that cross-react with grass pollen:.Vegetables and spices (carrot, celery, bell pepper, onion, cauliflower, cabbage, broccoli).Fruits (watermelon, honeydew melon, cantaloupe, banana)įoods that cross-react with mugwort pollen:.Spices (parsley, caraway, fennel, coriander, aniseed)įoods that cross-react with ragweed pollen:.Fruits (apple, peach, apricot, cherry, plum, pear).The following are foods that cross-react with pollens.įoods that cross-react with birch tree pollen: Non-plant-based foods, such as milk, egg and seafood, do not cause oral allergy syndrome. Adults tend to be affected more often than children. Not all pollen-allergic patients have symptoms, and some will react to one or two foods, while others may react to multiple foods. Symptoms sometimes worsen during pollen season because of a boost in pollen-allergic antibodies. The immune system becomes confused and causes an allergic reaction that can lead to an itchy, tingly mouth and sometimes a mild sensation of swelling in the mouth or lips. Oral allergy syndrome is caused by a cross-reaction between various pollens and certain proteins in fruits, vegetables and nuts that are structurally similar to the proteins in pollen. Symptoms usually occur within minutes of eating the food. Some people who are allergic to pollen develop itchiness or swelling of the mouth, face and throat when they eat certain fruits and vegetables.
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