Unlike a skin prick test, results of an allergy test may take a few days. In our lab, a sample of your blood is exposed to different allergens (substances) that you may be allergic to. Elevated levels of IgE indicate an allergic reaction. Most allergies can be dealt with by managing your lifestyle and through medication and avoidance. In some cases, your reaction to a specific allergen is non-IgE mediated and may not be confirmed by this test. Generally, inhaled allergens such as dust mites, tree, grass or weed pollens will produce respiratory symptoms. Ingested (food) allergies will produce skin and/or gastrointestinal symptoms or anaphylaxis. However, both types of allergens (ingested and inhaled) can produce the full spectrum of allergy symptoms.