When to get an ulcer checked
A mouth ulcer can be uncomfortable and worrying. Some sores develop after local irritation, including contact with a sharp tooth, denture or appliance. Other conditions can also cause sores, so appearance alone may not establish the cause. [1]
The important question is whether the area is healing as expected. The US National Institute of Dental and Craniofacial Research advises seeing a dentist or doctor when oral symptoms persist for more than two weeks. These symptoms can include a sore, a red or white patch, a lump, persistent pain or difficulty chewing or swallowing. [2]
Two weeks is a prompt for review, not an instruction to postpone care. A lesion that already looks suspicious needs prompt professional assessment. [3]
What should you tell the dentist
Before your appointment, note when the ulcer began, whether it has changed and whether it has occurred in the same place before. Mention any difficulty swallowing, unexplained bleeding or a neck lump. Bring a list of medicines and explain any tobacco or areca-nut product use honestly.
If you have photographs showing changes over time, bring them. Photographs may help document progression, but they do not replace examination.
Why a biopsy may be advised
A biopsy allows tissue to be examined rather than relying only on its surface appearance. For clinically suspicious lesions, professional guidance supports biopsy or specialist referral. Adjunctive tests should not replace an indicated biopsy or referral. [3]
Being advised to undergo a biopsy means the clinician needs more information. It does not mean the diagnosis has already been established.
Make follow-up specific
If your clinician recommends a short review period, confirm the review date and what should happen if the ulcer persists. Ask which changes should lead you to return sooner.
Avoid repeatedly treating an unexplained sore without reassessment. Seek urgent care for breathing difficulty, inability to swallow fluids or uncontrolled bleeding.
The useful response to a persistent ulcer is a clear plan: examination, appropriate investigation and review of the result. Timely attention provides a better basis for decisions than reassurance based only on a photograph or temporary symptom relief.
Sources
[1] American Dental Association, MouthHealthy. Reasons to See a Dentist. https://www.mouthhealthy.org/top-reasons-to-visit-dentist
[2] National Institute of Dental and Craniofacial Research. Oral Cancer. https://www.nidcr.nih.gov/health-info/oral-cancer
[3] American Dental Association. Oral Cancer Guideline and living guideline resources. https://www.ada.org/resources/research/science/evidence-based-dental-research/oral-cancer-guideline/