Untreated decay tends to worsen and leads to more severe problems. Toothache alerts us that we need to see the dentist promptly.
Causes of tooth pain:
– Infections happen when bacteria get inside teeth and their roots, usually due to decay or trauma.
– Sensitive teeth result from over-brushing and, consequently, damaged tooth enamel.
– Stressful grinding of the teeth may also cause toothache. Known as bruxism, the habit typically occurs during sleep.
Addressing toothache as quickly as possible is always a good idea in case you need treatment to save the tooth.
Further detail here:
https://yourdentalhealthresource.com/what-are-the-causes-of-toothaches/