What Is a Mouth Ulcer?
7. When Should You Be Concerned About a Mouth Ulcer?
In many cases, mouth ulcers are painful but not dangerous. However, there are some situations that warrant a reason for concern. If these criteria are met, further evaluation from a doctor is necessary to ensure there are not more serious conditions causing the sore.
Some people may develop very large, severe sores, have a fever, or get a secondary bacterial infection. Individuals should also see a doctor if they have a non-painful lesion that has lasted longer than three weeks or is starting to spread throughout the mouth. If a sore develops right after starting a new medication, patients should notify their doctor during the next appointment.
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