One is the allergen skin test and the other is the venous blood allergen-specific IgE test for allergens, which is done without fasting. Allergen testing includes inhalation, ingestion allergen testing and contact allergen testing. For children under five years old, the focus is on the specific IgE test for ingestion allergens, but the so-called food intolerance is not recommended (the test is for IgG antibodies, which are actually protective antibodies.) Inhalant allergens are usually checked for allergies to things we can encounter in our lives, mainly dust mites, molds, pollen and animal fur, etc.