Allergic reactions can scare even the most veteran mothers out there. After all, allergic reactions can be life-threatening and often require an immediate response to get them under control. While that’s scary enough, this reaction can even catch parents off guard if their child has never experienced an allergic reaction before. But what can cause a child to develop a food allergy that they never experienced as a baby? And how can parents handle these reactions if, heaven forbid, they happen?