Mouth ulcers are common and should clear up on their own within a week or 2. They're rarely a sign of anything serious, but may be uncomfortable to live with.
Mouth ulcers need time to heal and there's no quick fix.
Avoiding things that irritate your mouth ulcer should help:
use a soft-bristled toothbrush
drink cool drinks through a straw
eat softer foods
get regular dental check-ups
eat a healthy, balanced diet
do not eat very spicy, salty or acidic food
do not eat rough, crunchy food, such as toast or crisps
do not drink very hot or acidic drinks, such as fruit juice
do not use chewing gum
do not use toothpaste containing sodium lauryl sulphate
A pharmacist can recommend a treatment to speed up healing, prevent infection or reduce pain, such as:
You can buy these without a prescription, but they may not always work.
A GP or dentist may prescribe stronger medicine to treat severe, recurrent or infected mouth ulcers.
You may have more than 1 ulcer at a time and they can change in size.
Mouth ulcers are not contagious and should not be confused with cold sores.
Cold sores appear on the lips or around the mouth and often begin with a tingling, itching or burning sensation.
If you have several mouth ulcers, this can be a symptom of:
Most single mouth ulcers are caused by things you can try to avoid, such as:
Sometimes they're triggered by things you cannot always control, such as: