David Hahn DDS MS, INC

There has been number of patients seen in emergency for toothache. And they were surprised to find toothache was related to their sinus.
More information regarding sinusitis referred tooth pain.
http://www.mayoclinic.org/diseases-conditions/acute-sinusitis/expert-answers/toothache/faq-20058299

Sinus infection and toothache: Any connection? - Mayo Clinic Sometimes the cause of a toothache isn't a tooth problem, but a sinus problem.