Spring seems to be arriving earlier than ever this year, and -- along with it -- allergy season. As seasons change and rains bring budding trees, green lawns, and fields of flowers, millions of Americans are plagued with spring allergies. More than 35 million people in the United States suffer from allergic rhinitis -- and some may be surprised to learn it's possible to develop allergies later in life as well. It is estimated that the work missed due to allergies amounts to $250 million annually. So, what’s an allergy sufferer to do?