About this condition
A mucocele is a mucus-filled swelling associated with a small salivary gland, frequently on the inner lower lip. Some change size or temporarily disappear, but an examination is needed before deciding what the bump represents.
What matters most
Minor salivary ducts may be disrupted after lip biting or another injury. Mucus can collect beneath the oral lining and produce a soft swelling. An apparent mucocele can recur after it bursts or becomes smaller.
Symptoms and reasons to seek care
A smooth rounded bump on the inside of the lower lip can look translucent or blue-tinted and may change in size. A child may bite it repeatedly or notice discomfort while eating; many are not painful.
How it differs from similar conditions
Not every lip swelling is a mucocele: traumatic fibroma, vascular lesions, inflammation and other conditions can appear similar. Persistent ulceration, bleeding or rapid growth should not be dismissed based on colour alone.
Assessment and diagnosis
The clinician examines the lips and mouth, asks about biting, growth, recurrence and discomfort, and checks consistency and surrounding tissues. Unusual or persistent lesions may need additional specialist assessment or tissue examination if removed.
Monitoring and treatment
Some small mucoceles resolve on their own. Persistent, recurrent or troublesome lesions may lead to discussion of removal by an appropriate specialist. Do not puncture, burn or squeeze the swelling at home; this page does not promise a particular operation at MZ.
When emergency help is needed
Severe swelling in the mouth, new difficulty breathing or swallowing, rapid deterioration or uncontrolled bleeding requires urgent medical attention. For an emergency call 103 or 112, rather than waiting for a scheduled visit.
Related information
Signs and symptoms
A smooth rounded bump on the inside of the lower lip can look translucent or blue-tinted and may change in size. A child may bite it repeatedly or notice discomfort while eating; many are not painful.
Diagnosis and tests
The clinician examines the lips and mouth, asks about biting, growth, recurrence and discomfort, and checks consistency and surrounding tissues. Unusual or persistent lesions may need additional specialist assessment or tissue examination if removed.
Care and treatment approaches
Some small mucoceles resolve on their own. Persistent, recurrent or troublesome lesions may lead to discussion of removal by an appropriate specialist. Do not puncture, burn or squeeze the swelling at home; this page does not promise a particular operation at MZ.
When to seek urgent care
Severe swelling in the mouth, new difficulty breathing or swallowing, rapid deterioration or uncontrolled bleeding requires urgent medical attention. For an emergency call 103 or 112, rather than waiting for a scheduled visit.
Frequently asked questions
Can a mucocele get smaller and then return?
Yes. A mucus swelling may drain and refill if the underlying duct problem remains.
Does every mucocele need surgery?
No. Some resolve without intervention; a specialist considers persistence, symptoms and the diagnosis.
Can I puncture the bump to release the fluid?
No. Attempting to puncture it may cause injury, bleeding or infection and does not necessarily prevent recurrence.
Information sources
Medical source links used when preparing this article.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
