Many mouth sores have non-serious causes, but a persistent sore should be examined rather than identified from a photograph.

What to notice

Record when the sore appeared, its location, any injury or rubbing, and whether similar sores recur. Mention medicines and symptoms elsewhere in the body.

When an examination matters

A sore, lump or red or white patch that lasts longer than two weeks should be assessed by a dentist or doctor. Persistent change does not automatically mean cancer, but it should not be ignored.

The next step

An examination may be enough to guide care, or the clinician may recommend a specialist or a biopsy. Avoid harsh products or repeated self-treatment while a lesion remains unexplained.

Bring these questions to your consultation

  • What did the examination show, and what are my options?
  • What are the benefits, risks and alternatives in my case?
  • How many visits are expected, and who handles follow-up?
  • What is included in the estimate, and what will I pay?

Frequently asked questions

Can I choose treatment from this guide?

Use this guide to prepare questions. An examination and your health history are needed to determine which options fit your situation.

Do I need to see a specialist?

A general dentist can often begin an assessment and explain whether a specialist referral would help. Referral arrangements vary by service and practice.

Sources and transparency

A useful next read

Understand oral cancer