Consuming fresh fruits like cherries can lead to oral allergy syndrome now called as pollen food allergy syndrome. The symptoms are mouth itching, with or without swelling of lips, tongue, palate (roof of the tongue) and throat. The IgE allergy test uses your blood sample to see whether you are allergic to cherry or not. Traditionally the test was performed by skin pricking method where a food item is pricked in your skin through a needle and the reaction the body gives was taken as the result of allergy test. Quick blood test allows the doctor to test allergy externally rather than causing unnecessary and painful reactions in your system.