Christmas tree syndrome – should we be concerned?

There have been a number of articles and papers over the years where ‘Christmas tree syndrome’ is discussed. The syndrome is defined as a seasonal allergic illness of various intensity caused by the moulds and allergens that are present on live Christmas trees, when they are placed and decorated within a warm and enclosed indoor space. The condition is seen every year and presence of a live Christmas tree certainly increases the amount of mould spores, pollen, terpenes, dust mites, insect droppings, pesticides and other allergens to the room, which may lead to Christmas tree syndrome. However, do we need to be concerned? What is the impact? The available papers and articles will be reviewed to assess the significance and potential impact of this syndrome. 

History behind the Christmas tree

A little history is required to understand the origins of this tradition, with research suggesting that the tree of paradise, a fir tree decorated with apples within the medieval period were the forerunners of the Christmas tree. These trees served as a central prop in medieval plays to commemorate Adam and Eve on 24 December each year. The apples represented the forbidden fruit from the ‘tree of knowledge of good and evil’ and were later replaced by shiny red baubles.¹