A toothache that comes and goes might have been caused by sensitivity in your teeth (especially after consuming hot or cold drinks or food). It might have also been caused by underlying tooth decay or infection.
How do you know if your toothache is serious
Even if it’s just a toothache that comes and goes, it’s always highly recommended to visit a dentist. This is to prevent further tooth damage and spare you from potentially more expensive treatment. This early check-up and diagnosis can also help detect if there’s any serious infection in the teeth and gums (this infection might cause extreme pain in the near future).
Because we’re worried the problem might be serious, some of us might delay seeing a dentist. However, the tooth damage or infection might be continuously getting worse. It might only take a few days or weeks before you actually feel the extreme pain in your tooth or see unusual inflammation in your gums. By that time, it might become too late to save the tooth (or you have to undergo an expensive treatment).