The U.S. News & World Report says the number of children with food allergies has increased 18% since 1993, and the number of kids who needed emergency treatment for food allergy reactions has tripled in that time.
An estimated 6 to 9% of all U.S. children have a food or digestive allergy. At the same time, the incidence of eczema and skin allergies has also gone up. Health care professionals are quickly looking to find a reason for this increase in children food allergies, as well as environmental allergies.
To detect children food allergies, the doctor will ask parents about their child’s food allergy symptoms and may ask them to keep a food diary to monitor the reactions. The doctor may ask parents to remove suspected foods from the child’s diet one at a time to rule out certain allergies.
There will be a blood test to look for Immunogloblin E antibodies. A negative result can help rule out food allergies, although a positive result doesn’t necessarily mean the child has the allergy.
A skin prick test involves placing small amounts of suspected food allergens on the skin of the child’s forearm or back and pricking the skin with a needle to allow the substance to get beneath the skin. If there is an allergy, a raised bump or small rash will appear.
Perhaps blood tests for children food allergies fail because they cannot distinguish between similar proteins in different foods. For instance, a child with an allergy to peanuts may also test positive for kidney bean, green bean, pea and soy allergies.
Similarly, a child with a milk allergy may also test positive for a beef allergy. Dr. David Fleischer tells parents the best indicator may be simply to note whether the child has tolerated a particular food in the past.
In some cases, intolerance to a specific food develops over time, which is different than a serious, life-threatening allergy. Also, many food allergies (such as milk, eggs, soy and wheat) can be outgrown, so food challenging tests should be done again over time.
To read more Testing For Children Food Allergies