However, tooth decay and gum disease are not trivial and should never be considered as such. They are chronic diseases, and can be the root cause for systemic infections and degenerative conditions which may eventually lead to death. Yes, death can be caused by a simple toothache.
Also, can you die from an abscessed tooth?
It's not so much that you'll die of pain, of course, but dentists and research confirm that an untreated abscess can infect other parts of the body, either through the bones or the bloodstream. Most people won't die from a toothache, but it's a condition that if left untreated can lead to the worst: a fatal result.