Peanut allergies are the most common cause of food related death. Four percent of children are allergic to peanuts and only 20 percent of those children ever outgrow the allergy. Symptoms of peanut allergy can include rashes, itchy skin, sneezing, teary eyes, vomiting, stomach cramps, diarrhea, and swelling. But severe symptoms may include anaphylactic shock, which can be deadly if not treated immediately. You don't mess with food allergies.