Blister inside bottom lip
A blister on the inner lower lip is often a fluid-filled irritation or mucus cyst, but its appearance and duration determine the next step.
What could a blister inside the lower lip be?
A blister on the inner lower lip is often a fluid-filled irritation or mucus cyst, but its appearance and duration determine the next step.
How can a small salivary duct injury form a mucus cyst?
The inner lower lip contains minor salivary glands that can form a mucus cyst after a small duct is injured. Biting, sharp teeth, braces, hot food, and viral sores can also produce a tender or raised lesion.
How should you protect a blister inside your lower lip?
Avoid biting or popping the area, and use a soft toothbrush while it heals. Choose cool, soft foods and avoid irritating spices or very hot drinks; a dentist can remove a persistent mucus cyst or treat a sharp source of trauma.
When should a lower-lip lesion be examined by a dentist?
Book an examination if the lesion lasts beyond two weeks, repeatedly returns, becomes firm, or bleeds without clear injury. Seek prompt care for spreading swelling, fever, difficulty swallowing, or difficulty breathing.
What might this inner-lip lesion look like to a dentist?
Ask whether the appearance fits a mucus cyst, traumatic ulcer, cold sore, or another lesion. Ask whether a sharp tooth, appliance, or salivary duct needs treatment and whether removal or sampling is indicated.
Frequently asked questions
What can cause this change?
The inner lower lip contains minor salivary glands that can form a mucus cyst after a small duct is injured.
When should I arrange an examination?
Book an examination if the lesion lasts beyond two weeks, repeatedly returns, becomes firm, or bleeds without clear injury.
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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.