Kids and Food Allergies: What to Look For

Written by Stephanie Watson | Published on November 25, 2014
Medically Reviewed by George T. Krucik, MD, MBA on November 25, 2014

Do you know the signs?

peanut allergies

Know the Signs

Every parent knows that kids can be picky eaters, especially when it comes to healthy foods like broccoli and spinach. Yet pickiness has nothing to do with some kids’ refusal to eat certain dishes. About one out of every 13 children is allergic to at least one food, according to the American College of Allergy, Asthma, and Immunology. For more than one-third of these kids, eating that food could be life threatening.

The big problem is that most parents have no idea if their children have food allergies until they try the food for the first time and have a reaction. That’s why it’s important for parents — as well as teachers, babysitters, and everyone else who spends time with the child — to be alert for signs of a food allergy.

Recognize the symptoms of a peanut allergy and learn how to live with this common food allergy »

Which Foods Trigger Allergies in Kids?

When a child has a food allergy, their immune system overreacts, producing antibodies to the food as if it were a virus or other dangerous foreign invader. This immune reaction is what produces allergy symptoms.

The most common food allergy triggers in kids are:

  • peanuts and tree nuts (walnuts, almonds, cashews, pistachios)
  • cow’s milk
  • eggs
  • fish and shellfish (shrimp, lobster)
  • soy
  • wheat

Food Allergy Symptoms

A true food allergy can affect your child’s breathing, intestinal tract, heart, and skin. A child with a food allergy will develop one or more of the following symptoms within a few minutes to an hour after eating the food:

  • congestion, runny nose
  • cough
  • diarrhea
  • dizziness, lightheadedness
  • itching around the mouth or ears
  • nausea
  • red, itchy bumps on the skin (hives)
  • red, itchy rash (eczema)
  • shortness of breath, trouble breathing
  • sneezing
  • stomach pain
  • strange taste in the mouth
  • swelling of the lips, tongue, and/or face
  • vomiting
  • wheezing

Young children can’t always clearly explain their symptoms, so sometimes parents have to interpret what the child is feeling. Your child might be having an allergic reaction if he or she says something like:

  • “There’s something stuck in my throat.”
  • “My tongue is too big.”
  • “My mouth itches.”
  • “Everything is spinning.”

When to Get Emergency Help

Protect Your Family
Print this informational sheet out to share with teachers, friends, and family.
Print these allergy alert cards and give them to others so they know what to do in an emergency.

Some kids develop a severe allergic reaction, called anaphylaxis, in response to foods like peanuts or shellfish. If your child has trouble breathing or swallowing after eating something, call 911 right away for emergency medical help.

Signs of a severe allergic reaction (anaphylaxis) include:

  • chest pain
  • confusion
  • fainting, unconsciousness
  • shortness of breath, wheezing
  • swelling of the lips, tongue, and/or throat
  • trouble swallowing
  • turning blue
  • weak pulse

Kids with severe food allergies should have an epinephrine (adrenaline) auto-injector with them at all times in case they have a reaction. Both the child, and the people who care for them, should learn how to use the injector.

Food Allergy vs. Intolerance: How to Tell the Difference

Reacting to a particular food doesn’t necessarily mean your child has a food allergy. Some kids are intolerant to certain foods. The difference is that a food allergy involves the child’s immune system, while food intolerance is usually based in the digestive system.

Food allergies tend to be more dangerous. The child will usually need to avoid the offending food entirely. Food intolerance often isn’t as serious. The child may be able to eat small amounts of the substance.

Examples of food intolerances:

  • lactose intolerance: This occurs when the child’s body lacks the enzyme needed to break down the sugar in milk. Lactose intolerance can cause symptoms like gas, bloating, and diarrhea.
  • gluten sensitivity: This occurs when the child’s body reacts to a protein called gluten in grains like wheat. Symptoms include headache, upset stomach, and bloating. Although celiac disease — the most severe form of gluten sensitivity — does involve the immune system, its symptoms are usually centered in the gut.
  • sensitivity to food additives: This occurs when a child’s body reacts to dyes, chemicals like sulfates, or other additives in foods. Symptoms include rash, nausea, diarrhea, and trouble breathing.

Because the symptoms of food intolerance are sometimes similar to those of a food allergy, it can be hard for parents to tell the difference. Here’s a guide to distinguishing a food allergy from intolerance:

 Food IntoleranceFood Allergy
Bloating, gasX 
Chest pain X
DiarrheaXX
Itchy skin X
NauseaXX
Rash or hives X
Shortness of breath X
Swelling of the lips, tongue, airways X
Stomach painXX
VomitingXX

What to Do If Your Child Has a Food Allergy

If you suspect your child has a food allergy, see your pediatrician or an allergist. The doctor can identify which food is causing the problem and help you develop a treatment plan. Your child may need medicines like antihistamines to treat the symptoms.

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