Christmas Tree Syndrome (Christmas Tree Allergy)

 

Clinical features:

(1) An exposure to a natural Christmas tree (indoor coniferous tree), usually one that is indoors.

(2) The onset of respiratory or other allergic symptoms sometime after the exposure.

(3) Remission of symptoms when the natural Christmas tree and all of its material are removed.

 

Clinical findngs may include:

(1) sneezing

(2) wheezing or worsening of asthmatic symptoms

(3) skin rash

(4) lethargy

(5) insomnia

 

Possible allergens include:

(1) pollen

(2) molds

(3) oleoresins from the tree

 

Skin testing can help to identify the triggering allergen(s) and confirm the diagnosis.

 

Differential diagnosis:

(1) exposure to other indoor allergens associated with holiday decorations

(2) depression

 

An affected patient usually does fine with an artificial tree.