General practice·General practice
Mouth ulcers
Informed by recognized medical guidance
Overview
Mouth ulcers are small, painful sores that develop inside your mouth – on the inside of your cheeks, lips, gums, or tongue. They are usually harmless and heal on their own within a week or two.
Key facts
- Most mouth ulcers are not serious and heal without treatment.
- They usually last between 1 and 2 weeks.
- Recurrent mouth ulcers are common and often run in families.
Yes, mouth ulcers are very common. Most people will have at least one in their lifetime.
Mouth ulcers can affect anyone, but they are more common in teenagers and young adults. Women may get them more often than men.