Peanuts are one of the more misidentified food products that are commonly eaten. Despite its name, a peanut is not a nut at all but actually a legume (a plant that contains its seeds within long pods). Those who seek a peanut-free lifestyle are usually doing so due to an allergic reaction. This reaction typically occurs within minutes and can be mild to severe. Mild symptoms can include hives, redness or swelling of the skin, tingling and itching in the throat or around the mouth, diarrhea, cramps, nausea, vomiting, runny nose, shortness of breath or weezing. Read More.