There is a good chance that you have had tonsil stones, but you may not even be aware that you have them. These little lumps develop when bacteria are trapped in the crevices of the tonsils. Tonsils, which are tiny tissue lumps at the back or throat of your mouth and neck, protect you from infection that may enter the body through your mouth. To avoid accumulation of bacteria, it is essential to floss and brush your tonsils regularly.