If an 8-year-old child has tonsil stones, it may be caused by bad habits, bacterial infection, etc. It usually manifests itself as bad breath, sore throat, foreign body sensation and other symptoms. 1. Bad habits: If an 8-year-old child has tonsil stones, it may be due to the fact that he does not clean up his oral hygiene after eating, resulting in food residues gathering in the tonsils, which may lead to the deposition of inorganic salts such as calcium and magnesium that are not easy to dissolve in the food residues, and tonsil stones may form in the long term. 2. Bacterial infection: food residues can easily cause oral bacteria, generally due to bacterial infection, food residues will gradually harden, thus forming tonsil stones. In addition, if the patient has tonsillitis, will be more prone to tonsil stones, it is recommended that the patient timely medical treatment, and actively cooperate with the doctor treatment. Tonsil stones in 8-year-old children may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.