Mouth ulcers are common and should clear up on their own within a week or two. They’re rarely a sign of anything serious but may be uncomfortable to live with. You may have more than one ulcer at a time and they can change in size.
Mouth ulcers aren’t contagious and shouldn’t 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 could be a symptom of hand, foot and mouth disease, which also causes a rash on the hands and feet or oral lichen planus, which causes a white, lacy pattern inside the cheeks.
Mouth ulcers need time to heal and there is no quick fix. Avoiding things that irritate your mouth ulcer should help speed up the healing process, reduce pain and reduce the change of it returning.
You can’t always prevent mouth ulcers. Most single mouth ulcers are caused by things you can try to avoid such as:
Sometime they’re triggered by things you can’t always control, for example:
Speak to your pharmacist who can recommend a treatment to speed up healing, prevent infection or reduce pain, for example:
You can buy these without a prescription but they may not always work.
See a dentist or GP if your mouth ulcer:
Although most mouth ulcers are harmless, it is best to get a long-lasting mouth ulcers checked.