Is it possible that I am allergic to my Christmas tree?

Yes. Allergists have suspected for decades that live Christmas trees, when cut down and brought indoors, can spew out mold spores that can trigger allergies in susceptible people.

Last month, in a small study presented at a meeting of the American College of Allergy, Asthma, and Immunology, Dr. John Santilli of Bridgeport, Conn., documented the phenomenon.