Burning sensation corner of mouth
A burning feeling at the corner of the mouth usually reflects irritated, cracked lip tissue, angular cheilitis, or contact irritation, but the cause.
The short answer
A burning feeling at the corner of the mouth usually reflects irritated, cracked lip tissue, angular cheilitis, or contact irritation, but the cause needs examination if it persists.
Why does the mouth corner become cracked or irritated?
Common contributors include saliva pooling, lip licking, denture-related changes, yeast or bacterial overgrowth, nutritional problems, and irritating toothpaste or cosmetics.
How can you protect a burning mouth corner today?
Keep the area gently clean and dry, avoid licking or picking it, and use plain petrolatum as a barrier unless a clinician has advised another product.
When does a mouth-corner crack need dental review?
Arrange dental or medical review if the crack persists, spreads, crusts, bleeds, recurs, or is accompanied by mouth sores, facial swelling, or fever.
What should you ask about a persistent mouth-corner crack?
Ask whether the finding is angular cheilitis, dermatitis, infection, or another lesion, and whether a swab, medication review, or blood test is appropriate.
Frequently asked questions
Can there be more than one cause?
Common contributors include saliva pooling, lip licking, denture-related changes, yeast or bacterial overgrowth, nutritional problems, and irritating toothpaste or cosmetics.
What should I do while arranging care?
Keep the area gently clean and dry, avoid licking or picking it, and use plain petrolatum as a barrier unless a clinician has advised another product.
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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.