Medically reviewed by Benjamin F. Asher, MD Key Takeaways Tonsil stones form when food and debris get trapped and harden in the tonsils. Tonsil stones are often harmless but can cause bad breath and ...

Even if you don't think you've had a tonsil stone, it's possible you've felt the effects of one without realizing. While these little collections of food and bacteria aren't harmful, they can cause ...