Dose tooth decay cause headaches?

If your tooth is decayed enough to have the nerve exposed than definitely. You can correct this by going to the dentist and having the decayed part of the tooth drilled out and an artificial filling put in. However, If your headaches still persist, I would see a doctor.

Dose tooth decay cause headaches?
Yes.
Reply:actually yes it can cause somtimes....when there is pulpal involvement
Reply:I second what Mike D said. Tooth decay can definitely cause headaches, but it COULD be something else! Best to deal with it right away, rather than have to have a root canal or lose a tooth!