Many people have food sensitivities or intolerances. These are foods that are otherwise harmless. But your body may be sensitive to it. So, whenever, you have such foods, your immune system acts to protect you. Most of the time, you may experience a mild skin rash, itchy eyes or scratchy throat. But sometimes, the allergic reaction may be severe and even fatal. The best way to avoid food allergies is to avoid foods that trigger these reactions. But sometimes, if you have mild symptoms, you may not even know that you are allergic to certain foods. You have to be alert to symptoms like unexplained skin rashes, runny or stuffy nose, uncontrolled sneezing, watery eyes, funny taste in your mouth or an upset stomach, cramps, vomiting and diarrhea. These may be the result of a food allergy. In severe cases, you may have trouble breathing or swallowing, get swollen lips, tongue, or throat and suffer from exhaustion and an uneven heartbeat. Here, we reveal a few foods that may cause allergic reactions.