Overview
Canker sores are very common. They typically heal within one to two weeks, but some people get them repeatedly.
Symptoms
- Small, round sores with a white or yellow centre and red edge
- Pain, especially when eating or drinking
- Sores on the inside of the cheeks, lips, tongue or gums
Causes and risk factors
Triggers include minor mouth injuries, stress, hormonal changes, certain foods and low levels of iron, vitamin B12 or folate. Recurrent ulcers can be linked to coeliac disease or inflammatory bowel disease.
Diagnosis
A doctor or dentist diagnoses them by examining the mouth. Blood tests may be done for frequent ulcers.
Treatment
Most heal without treatment. Mouth rinses, gels and pain relief can ease discomfort. Any underlying deficiency is treated.
When to see a doctor
See a doctor or dentist if an ulcer lasts more than three weeks, is unusually large or keeps coming back.
This information is for general education and does not replace advice from a qualified doctor. For a medical emergency, call +92-51-8446666 or go to the nearest emergency department.
