Tonsil stones are small, white or yellow concretions that can form in the crevices of the tonsils; they are composed of bacteria, mucus, and food debris. They are a common problem, affecting up to 10% of the population. While tonsil stones are generally harmless, they can cause bad breath, a sore throat, difficulty swallowing, and other symptoms.
Dentists are able to see tonsil stones during a routine oral examination. They will typically use a small mirror to visualize the tonsils and look for any stones. If they find any stones, they may remove them using a cotton swab or a pair of tweezers.