Mouth ulcers are common, but experts have warned you should report them under certain circumstances. If they don’t go away or if you get them a lot, it’s worth determining whether this is normal.

While you might not think there’s anything wrong with your ulcers, it’s best to be cautious and to do your research or get them checked out if you seem to be having persistent issues. Cancer Research says: “It’s common to get ulcers (small sores) in the mouth when you’re a bit run down – they usually get better in about two weeks. But you should report an ulcer or red or white patch that doesn’t heal after 3 weeks to your doctor or dentist.”

The NHS offers similar advice, but it also says there are certain ways you can treat mouth ulcers yourself.

Mouth ulcers are rarely a sign of anything serious, but may be uncomfortable to live with, it says.

They need time to heal and there’s no quick fix but avoiding things that irritate your mouth ulcer should help.

This can help to speed up the healing process, reduce pain and reduce the chance of it returning.

The NHS recommends using a soft-bristled toothbrush, drinking cool drinks through a straw, eating softer foods, and getting regular dental check-ups. It also recommends eating a healthy, balanced diet.

In terms of what not to do, you should not eat spicy, salty or acidic food and you should not eat rough, crunchy food, such as toast or crisps.

You should also avoid very hot or acidic drinks, such as fruit juice and make sure you don’t  use toothpaste containing sodium lauryl sulphate.

By following these easy tips, you should be able to avoid recurring ulcers and instead you’ll be able to keep the inside of your mouth free from the discomfort they can cause.