The condition – ‘Christmas Tree Syndrome’ – is caused by mould growing on the trees, whose spores lead to problems when breathed in, the researchers have explained in ‘Annals of Allergy, Asthma and Immunology’ journal.
They analysed clippings from 28 Christmas trees including needles and bark, from a range of species, and found 53 cases of mould.
Of these, 70 per cent can cause symptoms including itchy noses, watery eyes, coughing, shortness of breath, chest pains, feelings of fatigue and problems sleeping.
Some of the mould identified can even lead to long term lung problems and conditions such as bronchitis and pneumonia.
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