Food allergy occurs when a person’s immune system reacts inappropriately to a food. The symptoms may include itching in mouth or hives on body. In more serious condition which is popularly called Anaphylaxis, a person might have sudden low blood pressure, swelling on face, breathing difficulty, nausea, abdominal pain. These symptoms are caused by the interaction between a food allergen and an antibody known as IgE (immunoglobulin E). So, basically, many people with a legume allergy will be sensitive to lentils or any other legumes. Any food containing protein has the capability of causing an allergic reaction, one of the examples is lentils. This can determined by Skin Prick Tests (SPTs) or Blood Test. SPTs are inexpensive, produce immediate results and are not even painful.