You’re brushing your teeth or glancing in the mirror when you notice them — small white bumps inside your mouth.
They might be on your cheeks, tongue, gums, or the roof of your mouth. They don’t always hurt. Sometimes they sting. Sometimes they seem to appear out of nowhere.
Naturally, your mind starts racing:
Is it something serious?
Is it an infection?
Did I eat something wrong?
The truth is, white bumps in the mouth can have several causes — most of them harmless. But in some cases, they can signal that your body is trying to tell you something.
Let’s break down what these bumps could mean.
🦷 1️⃣ Canker Sores (Very Common)
One of the most common causes of white bumps is a canker sore.
They usually:
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Appear as small white or yellowish spots
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Have a red border
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Feel painful or tender
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Heal within 7–14 days
They can be triggered by:
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Stress
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Minor mouth injuries (biting your cheek)
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Acidic foods
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Hormonal changes
Canker sores are not contagious and typically resolve on their own.
🦠 2️⃣ Oral Thrush (Fungal Overgrowth)