A cumin allergy is an adverse reaction by the body's immune system to cumin or food containing cumin. This type of allergy is rare and are generally not serious. The body's immune system produces immunoglobulin E and histamine in response to contact with the allergen.The symptoms of allergy include swelling in the mouth, running nose, watery eyes, vomiting, breathing trouble, a sudden drop in blood pressure, diarrhea and etc. One of the best ways to prevent cumin allergy symptoms is to avoid it. Skin prick test or blood test can be used by the doctors in order to confirm the allergy.