If eating or coming in contact with a specific type of fruit causes a negative physical reaction, make an appointment with your doctor. They might recommend you see an allergist. An allergist can offer a number of methods to make and confirm a diagnosis, including: reviewing your symptoms and suspected triggers reviewing your family history of allergies performing a physical examination using a skin prick test for a variety of fruits analyzing your blood for immunoglobulin E (IgE), an allergy-related antibody testing and measuring your reaction when you consume various fruits