Lip sore that won t heal
A lip sore that does not heal needs examination to identify ongoing trauma, infection, inflammation, or a less common tissue disorder.
The short answer
A persistent lip sore should be examined because trauma, infection, inflammation, and abnormal tissue change can look similar.
What changes can help identify the cause of a lip sore?
The clinician checks skin and mucosa for ulceration, crusting, firmness, colour change, bleeding, blisters, and contact with sharp teeth or appliances.
What can you do while waiting for a lip sore review?
Do not pick or burn it, remove obvious rubbing only with professional guidance, keep the mouth clean, and record changes.
When does a persistent lip sore need prompt care?
Arrange prompt review when it persists, repeatedly opens, becomes firm, bleeds without provocation, or is associated with a neck lump.
What should you ask about a lip sore that persists?
Ask what the location and surface suggest, whether trauma is involved, and whether testing or referral is needed.
Frequently asked questions
Can repeated lip biting cause a sore?
Yes, but a persistent lesion still needs examination after the irritant is addressed.
Should I use antiseptic?
Do not apply strong chemicals without advice; treatment depends on the cause.
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Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.