Ranula and Mucocele: The Fluid-Filled Bumps From Blocked Salivary Glands

A mucocele is a small, fluid-filled bump that forms when a minor salivary gland duct becomes blocked or damaged, typically from minor trauma like accidentally biting the lip, causing saliva to accumulate under the surface tissue rather than draining normally.

The most common location is the inner surface of the lower lip, though they can occur elsewhere in the mouth wherever minor salivary glands are present, appearing as a soft, dome-shaped, often bluish or translucent bump.

A ranula is similar in underlying cause to a mucocele but occurs specifically under the tongue, related to a blockage involving one of the larger salivary glands in that area, and tends to be larger than a typical mucocele given the different gland involved.

Generally, no, these are usually painless, soft swellings, though their size and location can sometimes cause a feeling of fullness or minor interference with normal function, particularly for larger ranulas.

No, both mucoceles and ranulas are benign, non-cancerous conditions related to a mechanical blockage of normal saliva flow rather than any concerning underlying disease process.

Yes, smaller mucoceles in particular sometimes resolve on their own, especially if the minor trauma causing the initial blockage isn't repeated, allowing normal drainage to eventually resume, though many persist and require treatment to fully resolve.

If a mucocele or ranula persists, keeps recurring, or is large enough to cause functional discomfort, treatment is generally recommended, since these don't typically resolve reliably on their own once established, particularly larger ones.

Surgical removal, including removing the small affected gland to prevent recurrence, is the standard, definitive treatment, performed under local anesthesia as a relatively minor procedure. For larger ranulas, a different, sometimes more involved surgical approach may be needed given the larger gland and structure involved.

If the specific affected gland isn't removed along with the fluid collection itself, recurrence is possible, which is part of why a more complete surgical approach, rather than simply draining the fluid, is generally recommended for a lasting resolution.

A dentist or oral surgeon typically diagnoses these based on their characteristic appearance and location, sometimes supplemented by imaging for larger or more complex cases, particularly certain ranulas that extend into deeper tissue.

Yes, given how commonly children experience minor lip-biting trauma, mucoceles are a fairly commonly encountered finding in pediatric dental and general dental practice.

Yes, having any new oral growth properly evaluated, rather than assuming based on appearance alone, is always the appropriate step, ensuring an accurate diagnosis and appropriate management recommendation for your specific situation.