- Food Allergies: Where They Hide
- Take the Quiz on Allergies
- Preparing for Severe Allergies at School
- Celiac Disease (Celiac Sprue) FAQs
- Patient Comments: Food Allergy - Describe Your Experience
- Patient Comments: Food Allergy - Symptoms and Signs
- Patient Comments: Food Allergy - Allergy Shots
- Patient Comments: Food Allergy - Common Foods
- Patient Comments: Food Allergy - Testing and Diagnosis
- Patient Comments: Food Allergy - Treatment
- Find a local Asthma & Allergy Specialist in your town
- Food allergy facts
- What is a food allergy?
- What causes allergic reactions to food?
- What are food allergy symptoms and signs?
- What are food allergy risk factors?
- Do infants and children have problems with food allergy?
- What are the most common food allergies?
- What is cross-reactivity?
- What is oral allergy syndrome?
- What is exercise-induced food allergy?
- What conditions have mistakenly been attributed to food allergy?
- What conditions mimic food allergy?
- What types of health care specialists diagnose and treat food allergies?
- How do health care professionals diagnose food allergies? What tests do health specialists use to diagnose food allergies?
- What is the treatment for a food allergy?
- Are allergy shots effective in preventing or decreasing food allergy?
- What are complications of food allergies?
- What is the prognosis (outlook) for food allergy?
- What research is being done on food allergies?
Quick GuideThe Most Common Food Allergies for Kids and Adults
What is oral allergy syndrome?
The oral allergy syndrome is another type of cross-reactivity. This syndrome occurs in people who are highly sensitive, for example, to ragweed or birch pollen. During the seasons that these allergens pollinate, the affected individual may find that when he or she tries to eat fruits, chiefly melons and apples, a rapid onset of itching is experienced in the mouth and throat, and the fruit cannot be eaten. The oral allergy syndrome is also known as pollen-food allergy syndrome and is thought to be a type of contact allergy related to the presence of proteins in certain foods that cross react with allergy-causing pollen proteins. Oral allergy syndrome occurs in up to 50% of those who have allergic rhinitis caused by pollen. Symptoms are immediate upon ingestion of fresh or uncooked foods and include the itching, irritation, and mild swelling of the lips, tongue, palate, and throat. Cooked fruits and vegetables usually do not cause the reaction. The symptoms usually go away within minutes, although up to 10% of people will develop systemic (body-wide) symptoms, and a small number (1%-2%) may experience anaphylactic shock. Tree nuts and peanuts tend to cause more severe reactions than other foods.
What is exercise-induced food allergy?
Exercise can induce an allergic reaction to food. The usual scenario is that of a person eating a specific food and then exercising. As he exercises and his body temperature increases, he begins to itch, gets lightheaded, and soon develops the characteristic allergic reactions of hives, asthma, abdominal symptoms, and even anaphylaxis. This condition has been referred to as food-dependent exercise-induced anaphylaxis (FDEIA) and is most common in teens and young adults. The cure, actually a preventive measure, for exercise-induced food allergy is simple -- not eating for at least two hours before exercising.