Based on the history and the photograph, this appears to be a recurrent aphthous ulcer (canker sore), which commonly presents as a small, painful white ulcer on the inner lip. These ulcers often recur due to stress, minor trauma, nutritional deficiencies (
Vitamin B12, folate, iron), or other underlying factors.
I also notice significant deposits of calculus and staining on your lower front teeth, which can cause chronic irritation and should be treated with professional scaling.
Next Steps
For the ulcer, avoid spicy and acidic foods, maintain good oral hygiene, and use a topical oral ulcer gel as prescribed by your dentist. Since the ulcer has been recurring for more than a month, I recommend a clinical examination. Your dentist may advise blood investigations (CBC,
Vitamin B12, iron, and folate levels) if indicated and rule out any local traumatic cause.
Health Tips
If the ulcer persists for more than 2 weeks without healing, becomes larger, or is associated with a persistent lump or bleeding, do not delay an in-person evaluation by an oral medicine specialist or oral surgeon.