Tonsil Stones Causes, Treatment and Home Remedies. (Tonsolloliths) Tonsil stones are small white/yellow coloured balls that form in the back of the throat and inside the tonsils. These are made of clusters of bacteria which form a biofilm around themselves, and can stay lodged within the tonsils for many months or years if left untreated. Tonsil stones can cause you to have frequent throat infections, a sore throat and irritation so it's important to treat these as soon as possible. In this vide