Look at the pattern
An ulcer that heals and later returns is different from one that remains continuously in the same place. Describing this distinction helps the clinician understand what is happening.
Recurrent aphthous ulcers are a recognised cause of repeated painful oral sores. However, a person should not assume that every ulcer is aphthous simply because they have had ulcers before. [1]
Record more than the pain
Keep a short record of when each episode starts, where it occurs and when healing completes. Note whether several ulcers occur together and whether eating or drinking becomes difficult. A dated photograph can help when the ulcer has healed before your appointment.
Mention new medicines and symptoms elsewhere in the body. The consultation should consider the whole history rather than only the current sore.
When tests may help
Depending on the pattern and examination, the clinician may consider blood investigations. Specialist patient guidance describes assessment for deficiencies such as iron, vitamin B12 and folate in selected patients. Testing should address a clinical question; repeated ulcers do not automatically prove a deficiency. [1,2]
Avoid assuming that taking several supplements will establish or correct the cause. Ask why a test is being requested and what would change if it is abnormal.
Reassess a sore that behaves differently
An ulcer that persists, changes in character or fails to follow your usual healing pattern needs review. NHS guidance on recurrent ulceration specifically distinguishes persistent lesions that require assessment. [2]
Seek earlier advice if pain prevents adequate drinking or if you feel systemically unwell. Tell the clinician if the episode differs from your previous ones.
Build a clear management plan
Ask how to manage symptoms, what changes should prompt another appointment and whether specialist referral is appropriate. For repeated episodes, arrange follow-up that considers frequency and impact on daily life.
The aim is to understand the pattern and select investigations thoughtfully, rather than treating every episode with the same preparation indefinitely.
References
[1] University College London Hospitals NHS Foundation Trust. Recurrent aphthous stomatitis ulcers. Read source
[2] Cambridge University Hospitals NHS Foundation Trust. Recurrent oral ulceration. Read source