You’re basically correct in your description.
Tonsil stones (tonsilloliths) are small, hardened clumps that can form in the natural pockets (crypts) of the tonsils. They’re usually made of:
- trapped food particles
- dead cells
- mucus
- bacteria
Over time, this material can calcify and become hard.
Common signs
People may notice:
- white or yellowish spots on tonsils
- bad breath (very common)
- mild throat irritation
- feeling like something is stuck in the throat
Are they dangerous?
Usually no. Tonsil stones are generally harmless, though they can be annoying or cause bad breath.
What people usually do about them
- Gargling warm salt water
- Good oral hygiene (brushing + flossing + tongue cleaning)
- Staying hydrated
- In stubborn cases, a doctor can remove them safely
If they keep coming back frequently or become painful, an ENT specialist can check for chronic tonsil issues.
If you want, you can share the image you saw and I can confirm whether it actually looks like tonsil stones or something else.