Tonsil stones, or tonsilloliths, are clusters of calcareous matter that form in the rear of the mouth in the crevasses of the tonsils, called tonsillar crypts. Though the mechanism by which they form is debated, they are known to be composed of calcium salts, sometimes in combination with mineral salts. Typically small in size, they can be difficult to diagnose. However, they are not harmful and can usually be removed by the patient. How big can tonsilloliths get? Discuss
Source: The Free Dictionary