I have had what I thought was a sinus infection since January. After several rounds of antibiotics, a round of steroids, and a ct scan I have been told by an ENT that I do not have a problem with my sinuses.

I was told to go to my dentist and have him look at a tooth that has had 2 root canals. Is is really possible that a tooth that has had a root canal can be causing me problems on my face that I thought was from sinus? If I am told that I need to have the tooth removed, what options do I have? Will removal of the tooth end the pressure/pain I have been having?