You may not have adequate amounts of some enzymes needed to digest certain foods. Absence of an enzyme needed to fully digest a food.One of the tricky aspects of diagnosing food intolerance is that some people are sensitive not to the food itself but to a substance or ingredient used in the preparation of the food.Ĭommon conditions that can cause symptoms mistaken for a food allergy include: By contrast, if you have a true food allergy, even a tiny amount of the food may trigger an allergic reaction. Food intolerance and other reactionsĪ food intolerance or a reaction to another substance you ate may cause the same signs and symptoms as a food allergy does - such as nausea, vomiting, cramping and diarrhea.ĭepending on the type of food intolerance you have, you may be able to eat small amounts of problem foods without a reaction. Not eating for a couple of hours before exercising and avoiding certain foods may help prevent this problem. Serious cases may even involve hives or anaphylaxis. Some herbs and spices (anise, black pepper, caraway seed, coriander, fennel, mustard, parsley)Įating certain foods may cause some people to feel itchy and lightheaded soon after starting to exercise. Melons (cantaloupe, honeydew and watermelon) Some herbs and spices (anise, caraway seed, coriander, fennel, parsley) The following table shows the specific fruits, vegetables, nuts and spices that can cause pollen-food allergy syndrome in people who are allergic to different pollens. However, when these foods are cooked, symptoms may be less severe. Symptoms are typically triggered by eating these foods when they're fresh and uncooked. Proteins in certain fruits, vegetables, nuts and spices cause the reaction because they're similar to allergy-causing proteins found in certain pollens. In serious cases, the reaction results in swelling of the throat or even anaphylaxis. In this condition, certain fresh fruits and vegetables or nuts and spices can trigger an allergic reaction that causes the mouth to tingle or itch. Crustacean shellfish, such as shrimp, lobster and crabĪlso known as oral allergy syndrome, pollen-food allergy syndrome affects many people who have hay fever.The majority of food allergies are triggered by certain proteins in: The next time you eat even the smallest amount of that food, IgE antibodies sense it and signal your immune system to release a chemical called histamine, as well as other chemicals, into your bloodstream. In response, your immune system triggers cells to release an antibody known as immunoglobulin E (IgE) to neutralize the allergy-causing food or food substance (the allergen). When you have a food allergy, your immune system mistakenly identifies a specific food or a substance in food as something harmful. Constriction of airways that makes it difficult to breathe. Seek emergency treatment if you develop any signs or symptoms of anaphylaxis, such as: This will help your provider make a diagnosis. If possible, see your provider when the allergic reaction is occurring. See your health care provider or allergist if you have food allergy symptoms shortly after eating. Untreated, anaphylaxis can cause a coma or even death.
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