Hey earlier today i coughed up a really big yellow ball and i was curious as to what this strange thing was, so i googled it naturally. I have had these for a while and they are known as tonsil stones. They cause really bad breath and are cause by smoking and swalling your phlegm and i dont smoke. I was wondering if any of you guys get these. they are small to large circle shaped things that get caught in your throat that you can cough up. they are completely harmless. Let me know what you guys think about these and if you have ever had them.