Symptoms of Tonsil Stones Source: YouTube Tonsil stones often go unnoticed if they are small, but they can cause various symptoms when they become larger or more abundant. Some common symptoms include (2): Really bad breath (halitosis) Sore throat or difficulty swallowing Metallic taste in the mouth Swollen tonsils Ear pain or pressure Persistent coughing Tonsil infections or tonsillitis If you...