Most children outgrow it by the time they are 2 or 3 years old. Some allergies last a whole lifetime. Make sure your child does not eat the food that causes the allergy. This should keep your child free of problems. Consider avoiding other foods in the same food group .
Some children are allergic to two or more foods, sometimes in the same food group.
For example, a child who is allergic to ragweed may also have problems with watermelon, cantaloupe, honeydew, and other gourds. Or a child allergic to peanuts may also have an allergy to soybeans, peas, or other beans. Give Benadryl four times a day if your child has just hives or itching. Do this until the hives are gone for 12 hours. For example, your child may not be able to have milk and cheese.