It's important to note that food allergy testing often results in a high number of false positive results. This means that your test could be positive but you can eat the food without a problem. Certain foods, such as wheat and soy, have a high percentage of false positives; for other foods, such as egg, a positive test often means you are allergic.
Lynda Schneider, MD, director of Children's Allergy Program
The symptoms of food allergy may resemble other problems or medical conditions, so you should always consult your child’s physician for a diagnosis.