Toothache is most commonly due to a cavity, which is decay that produces a hole in a tooth. Another frequent cause is inflammation of the gums, the soft tissue around the teeth. Cavities and gum disease are both caused by bacteria that accumulate, along with saliva and food particles, in deposits called plaque on the teeth. Cold, heat, or chewing may intensify toothache.

Magill’s Medical Guide (Online Edition), 2023. 2p.