Support WBURAre Food Allergies On The Rise? Experts Say They Don't KnowPlay03:01Download AudioAllison AubreyNovember 30, 2016 ShareDespite assumptions that peanut, egg and other allergies are becoming more common in the U.S., experts say they just don't know. One challenge: Symptoms can be misinterpreted and diagnosis isn't easy. (Getty Images)