Is this your child's symptom?
- Allergic reactions to foods
- The most common symptom is hives
- Questions about food allergies
- Oral Allergy Syndrome is also covered. The main symptom is mouth itching and swelling. The main triggers are raw fruits and veggies.
Symptoms of Food Allergies
- Hives all over and swelling of the face are the most common symptoms. Hives are raised pink bumps with pale centers (welts). They look like bug bites.
- Mouth itching and swelling
- Runny nose and coughing
- Vomiting and diarrhea
- Life-threatening allergic reactions also must have trouble breathing and/or swallowing. The medical name for this is anaphylaxis. Most of these reactions have a sudden onset within 10 to 20 minutes. All occur within 2 hours of eating a certain food. People who have had this carry an emergency kit like an Epi-Pen.
Causes of Food Allergies
- 8 foods cause 90% of food allergies
- In the first year of life: cow's milk, soy milk and egg
- Older children: peanuts, tree nuts, fish, shellfish and wheat
- Shellfish include shrimp, crab, lobster, clams, oysters and scallops
- Tree nuts include all the nuts (such as almonds and cashews) except peanuts.
- Of children with a proven food allergy, 40% have severe reactions. The other 60% have mild reactions.
- Peanuts and tree nuts are the most common triggers for severe reactions.
Cross Reactions with Other Foods
Children with allergies listed below can react to other foods:
- Cow's milk allergy: 90% also react with goat's milk and 40% with soy milk
- Egg: 5% react with chicken
- Peanut: 5% react with other legumes (like peas or beans). About 30% also react to tree nuts.
- Tree nut: 40% react with other tree nuts
- Fish: 50% react with other fish. Only 10% also react to shellfish.
- Shellfish: 70% react with other shellfish
- Melon: 90% react with banana and avocado
How Long do Food Allergies Last?
- Cow's milk: 80% outgrown by age 16
- Soy milk: 80% by age 16
- Egg: 70% by age 16
- Peanut: 20% by age 16
- Tree nut: 10% by age 16
Allergic Disease - Can You Prevent with Diet?
- Most allergic diseases (food allergies, eczema and asthma) cannot be prevented.
- Helpful: feeding only breastmilk for 6 months or longer
- Not helpful: avoiding high-risk foods for pregnant or breastfeeding women
- Not helpful: soy formulas instead of cow's milk formula
- Not helpful: a delay in starting baby foods past 6 months
- Not helpful: a delay in starting high-risk foods like peanut butter or eggs
- Source: AAP
Oral Allergy Syndrome (OAS)
- A minor reaction to some raw fruits and veggies
- Causes itching and swelling only to the lips and tongue
- Also called Pollen-Food Syndrome
Symptoms of OAS
- Rapid onset of itching (or tingling) and swelling of the mouth.
- This can involve the lips, tongue, throat, and roof of the mouth.
- The uvula (tag of tissue hanging down in back) can become very swollen.
- These symptoms follow eating a high-risk raw fruit or veggie.
- OAS can start by age 5.
- Serious symptoms or very bad reactions rarely happen.
Causes of OAS
- A contact allergy. It only involves the parts of the mouth that touch the raw food.
- Trigger foods for OAS are always raw (not cooked.)
- Fresh Fruits. These include apple, apricot, banana, cherry, melons, orange, peach and pear.
- Raw Veggies. These include carrot, celery, parsley, potato and tomato. Carrots and celery have the highest risk for also causing serious symptoms.
- Certain Seeds. These include sunflower seeds and fennel seeds.
OAS and Nose Allergies Can Be Linked
- Over 50% of people who are allergic to pollen also have OAS. This means 10% of all people.
- Ragweed pollen allergy can cross-react with all melons. Also, sometimes with bananas and tomatoes.
- Birch pollen allergy can cross-react with raw potatoes, carrots, celery and apples.
- Grass pollen allergy can cross-react with tomato and kiwi.
When to Call for Food Allergy
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