The Asthma Society of Ireland has warned asthma sufferers of the dangers posed by the Christmas festivities.
Dr Patrick Manning, consultant respiratory physician and chairman of the Asthma Society's medical committee, pointed out that Christmas trees gathered mould from being outdoors in wet weather.
"Mould spores are known to trigger an asthma attack in sufferers.
"Ideally, buy an artificial tree for the home, and vacuum it to remove any dust particles," he said.
"If you are intent on having a real tree, allow your tree to dry fully before bringing it into the home."
Dr Manning said artificial snow sprays and fragrance sprays could induce asthma symptoms and should be avoided.
"Wash fabric decorations in hot water before displaying; this will get rid of any dust that has been gathered while in storage," he said.
"Plastic, glass or metal decorations should be used in order to prevent them gathering dust mites."
He said stressful conditions such as Christmas preparations could trigger an attack, and cold weather could also affect the condition.
Dr Manning advised asthma sufferers who were planning a ski holiday to visit a doctor well in advance of departure to ensure that their asthma was under control.
He warned that prescribed inhalers may not work properly in freezing conditions.
"Cover your face with a scarf and carry your reliever inhaler while on the slopes.
"Take your written asthma diary, action plan and all medications with you on holiday. Ensure your medication is carried in your hand luggage, with spare supplies in your suitcase."
He also advised travellers to ensure that asthma attacks were specifically covered in their medical insurance.
There are an estimated 470,000 asthma sufferers in this State
