It's almost time to deck the halls and trim your tree, but beware you - and your loved ones - may well be struck down with Christmas Tree Syndrome.
Even though it's winter, the traditional centrepiece of any festive living room can cause classic spring hay fever symptoms as it harbours mould, and the longer you have the tree up, the worse it can be.
More than a third of Brits suffer from an increase in hay fever-like symptoms at Christmas, according to a poll for Prevalin Allergy, and sadly it's real trees that are the culprits.
Dubbed 'Christmas Tree Syndrome', symptoms of this festive health complaint include itchy noses, watery eyes, wheezing, coughing, chest pains, and insomnia, and can affect adults, children and even babies alike.
According to Boots Pharmacist Angela Chalmers: 'Christmas Tree Syndrome is caused by mould spores growing on the Christmas tree which then disperse around your home in the air, these can lead to problems when breathed in.'
Angela advises to look for symptoms such as itchy, sore, watery eyes, a blocked or runny nose and a persistent cough or wheeze.
It's worth noting that the symptoms can present a few weeks after the tree has been put up.
Angela says: 'This is because the mound spores grow and thrive in our warm central heated homes.'
To prevent your family from sneezing their way through the seasonal period here's a few things you could do...
'Consider moving the tree into a cooler, separate room where you can close the door,' suggests Angela. 'Or choose an artificial tree, but don't forget to hoover off any dust if you are bringing it back down from the loft.'
If you are concerned about the symptoms of anyone in your family, speak to your local pharmacist or GP for advice.