The number of visits to the doctor for allergies actually goes up during the holiday season. No, these people aren't allergic to Christmas but rather to molds on evergreens and dust mites on decorations. Basically, there are some uninvited guests on your decorations.
There are some things you can do to minimize the problem. Read about "Christmas Allergies" in the latest post on the Allergies and Colds page at
http://bellaonline.com/site/allergiesandcolds