When to See a Doctor
Typically, canker sores heal naturally after about a week or so. If you notice canker sores that are not showing signs of healing after a week, you should see a doctor because it might be a sign of another medical condition.
If you begin to experience frequent canker sores that heal and then come back, you should see a doctor as it may be as a result of what you are eating or a specific deficiency. Usually, with simple lifestyle changes, you will be able to overcome this. Furthermore, you should consult your doctor if you notice abnormally big canker sores, there may be a need for other forms of treatment depending on the cause and the condition of the canker sore.
