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Diagnosis of Mouth ulcer

You can normally diagnose mouth ulcers yourself from their appearance and the typical symptoms.    

You should ask your dentist for advice if:

• it is your first ulcer,
• the ulcer has an uneven discolouration and is deep,
• it is not causing you any pain or discomfort,
• you have had the ulcer for more than three weeks,
• it is bigger than 1 cm in diameter and is a single ulcer,
• you are taking any other medication, or
• you are pregnant.

If you also get ulcers in other parts of your body, such as the eyes or genital area, it is important that you tell your dentist about this.

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