One in four Irish people has chronic bad breath, but while the condition affects men and women equally, women are more likely to seek treatment, dentists have said.

According to the Irish Dental Association (IDA), once people realise they have bad breath, also known as halitosis, it is easy to treat.

"Often people are not aware that they are suffering from this condition and of course if that is the case they don't seek treatment. Not alone can it cause major embarrassment and disappointment for people, but it can also be a sign of gum disease," explained Dublin dentist, Dr Rachel Doody.

She said that if people suspect a family member or friend has halitosis, they should approach them privately about it.

"You will be doing them a favour dentally and socially," she pointed out.

Dr Doody noted that in 85% of cases, the origin of the smell is the oral cavity, i.e. the mouth, and this is a major warning sign of gum (periodontal) disease. Gum disease is caused by plaque - the colourless film of bacteria that constantly forms and sticks to teeth. These bacteria make toxins that can irritate the gums.

Having good oral health is essential to prevent gum disease and bad breath.

"People should brush their teeth twice a day, floss once a day, drink plenty of water, use mouth rinse and avoid trigger foods such as garlic and onions. Smoking is clearly bad for your health but also for your breath, as is alcohol and coffee," Dr Doody said.

She added that if bad breath persists, you should visit your dentist, as in a small number of cases it can be a sign of a more serious health problem.

"Some 80% of all Irish adults qualify for a free annual examination so if concerned, just make an appointment with your dentist."