Tonsil stones do not occur after bilateral tonsillectomy, but in the case of unilateral removal, the tonsil on the unresected side may still produce stones. Tonsil stones are usually caused by various reasons resulting in increased tonsil secretions, obstruction of the tonsil crypt opening, poor drainage of secretions, resulting in the crypt depth of decayed food debris, shedding epithelium, bacterial colonies and other foreign matter can not be discharged in time, wrapped in secretions. The deposits accumulate for a long time, calcify and harden, forming fine, white, hard particles. Tonsil stones may cause bad breath, sore throat, difficulty or pain associated with swallowing, and a foreign body sensation in the pharynx After bilateral tonsil removal, there is no more tonsil tissue in the mouth, so no more tonsil stones will grow. However, if only the affected side is removed, tonsil stones may still grow.