My gums are not swolen. Usually if there infection you get pus and stuff. I thought about pulling the tooth but not sure now. I'm very sensitive to hot and cold temperatures. I think my headaches can be due to this tooth.
I had all my amalgams replaced 5 months ago. Also replaced 4 metal crowns on root canal teeth to metal free crowns.
I don't know what else to think...it could all be related to mercury...