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How to prevent tonsil stones
Brush your teeth regularly.
Failure to maintain good oral hygiene is a primary cause of tonsil stones. Brushing your teeth in the morning, before bedtime, and after every meal is the foundation of healthy oral hygiene and first step in preventing tonsil stones.
This will help eliminate food particles and bacteria that can collect in your tonsils' nooks and crannies. Remember to brush your tongue as well, since it can harbor easy to miss bacteria, mucus, and food residue.