Dr Phil Kieran: What can I do about my daughter's mouth ulcers?

"Mouth ulcers, known as aphthous ulcers, are shallow with a pink-red or yellowish centre and are usually round or oval - they can be commonly caused by irritation due to poor dental hygiene, smoking, and continuous friction such as sucking lollipops."

Getting your child's diet and brushing routine right can help avoid a trip to the dentist.

My ten-year-old daughter often gets painful mouth ulcers.

She washes her teeth twice daily and only eats sweets during the weekend.