There are folds and crypts in our tonsils.
When there is chronic infection in the tonsils all the time, these kind of patients tend to suffer from tonsil stones or tonsilloliths.
So what is tonsillolith? It is nothing but accumulation of plaque, accumulation of dead cells, mucus and when this entire combination hardens or calcifies, it forms something called as tonsil stones.
It is a hard structure. It can be a negligible small stone or it can be a significant large stone.