Have you ever noticed a small, round bump inside your mouth — on your lip, under your tongue, or along your gums — and wondered what it was?
It might look alarming at first. It may feel soft, fluid-filled, or slightly swollen. Sometimes it appears suddenly, grows over a few days, and then either shrinks or stays the same.
In many cases, what you’re seeing could be a mucocele, a common and usually harmless oral cyst. But understanding what it is — and when to take action — is important.
Let’s break it down clearly and simply. 👇
🦷 What Is a Mucocele?
A mucocele is a small, fluid-filled swelling that forms inside the mouth. It usually develops when a salivary gland becomes blocked or damaged.
Saliva normally flows through tiny ducts in your mouth. If one of these ducts becomes irritated — often from accidental lip biting or minor trauma — saliva can get trapped under the surface of the tissue.
The result? A smooth, round bump that may look translucent or slightly bluish.
📍 Where Do They Usually Appear?
Mucoceles most commonly appear:
✔️ On the inside of the lower lip
✔️ Under the tongue
✔️ On the inner cheek
✔️ Occasionally on the floor of the mouth
When it forms under the tongue and becomes larger, it’s sometimes referred to as a “ranula.”
🔍 What Do They Look and Feel Like?
Typical characteristics include:
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Soft or jelly-like texture
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Clear, pink, or bluish color
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Painless in most cases
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Size ranging from a few millimeters to over a centimeter
They often fluctuate in size. Some shrink temporarily and then return.
While they may look concerning, most mucoceles are benign (non-cancerous).
🤔 What Causes Them?