Epidemiology and frequency of mouth ulcers

Mouth ulcers are one of the most common oral lesions and concern the general population on all five continents2. Many epidemiological studies have been done showing high variation on prevalence. On average, we can consider that mouth ulcers affect 15% to 30% of the general population with frequencies as high as 50% in certain social groups3 4. The age onset of minor aphthae can start as early as 5 years old whereas major aphthae generally starts after 20. Mouth ulcers tend to afflict women more than men.

The frequency of recurring aphthous stomatitis varies from less than 4 episodes per year (85% of all cases) to more than one episode per month (10% of all cases) including people suffering from continuous RAS4.

In the UK there are about 1.5 million people over 15 years old suffering from recurring mouth ulcers with more than two forming each month. 800,000 people have more than one crisis per month. More than 200,000 have more than one crisis every two weeks.


The datas of this chart are coming from the Swedish study of T Axéll & V Henricsson4.

Aftazen: mouth ulcer treatment discover our study on mouth ulcers
In Great Britain, 800 000 people have mouth ulcers more than once a month

Tip of the day:

Check that your toothpaste doesn't contain a substance likely to cause mouth ulcers