By Sarah Collins • February 1, 2026 • Share
Tonsil stones—also called tonsilloliths or caseum—are small, hardened deposits that develop in the tonsils. They form when food particles, bacteria, and dead cells get trapped in tiny pockets of the tonsils. Over time, this buildup solidifies and turns into small stone-like formations.
Although tonsil stones are usually harmless, they can be uncomfortable. Common issues include throat irritation, unpleasant breath, and sometimes pain when swallowing. Knowing why they form and how to deal with them can help you stay comfortable and support better oral health.
How do these pesky stones develop, you ask? Tonsil stones form when debris such as food, mucus, and bacteria becomes lodged in the tonsil crypts—the small folds and crevices on the tonsils. As this material sits there, it gradually hardens into stones.
People with larger tonsils or deeper crevices tend to be more susceptible. Poor oral hygiene, repeated throat infections, and breathing-related problems can also raise the risk. But what symptoms should you look out for?
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