Christmas trees could be to blame for a range of health complaints over the festive season, according to new research. Don't be too quick to judge those who feel under the weather over the festive period – rather than seasonal overindulgence, it could be their Christmas tree making them ill. The traditional centrepiece decoration has been blamed for triggering a range of health complaints, from wheezing and coughing to lethargy and insomnia. The condition – "Christmas Tree Syndrome" – is caused by mould growing on the trees, whose spores lead to problems when breathed in. It has been discovered by...