If youíve ever coughed up a small white or off-white lump from the back of your throat and wondered what it is, chances are itís a tonsil
stone or tonsillolith as they are medically known.
They develop in small cavities in the tonsil area and are a result of old food particles and bacteria build up. When crushed they
smell foul similar to rotten eggs. This is due to the high level of sulphur which makes up the stone itself. They are one of the main causes of halitosis with sufferers not knowing due to the stones
getting broken before they are coughed up.