Most people think of spring as prime allergy season, but wintertime can wreak havoc for allergy sufferers as well. Unlikely suspects like a Christmas tree could even be the cause behind some people’s winter allergy attacks. Allergies cause annoying sneezing, sniffling and itching that make people want to reach for sprays or over-the-counter allergy medications. These drugs often make people sleepy, which makes working, driving and other activities difficult, even dangerous. Manage winter allergies naturally.