Why does the tooth hurt after filling? This is a very common question on the Internet. Indeed, if the tooth hurts before visiting the dentist, this is understandable, but when the tooth is cured, what is wrong? Your dentist may not have done a good job. The better the filling, the less any discomfort after. In any case, with prolonged toothache after treatment, it is worth visiting the office of a quality specialist. I will leave you a link where you can read about the causes and prevention https://villagedentalmedicine.com/what-should-you-do-if-you-have-tooth-pain-after-filling/