In Aug 2007 I had my first root canal on my back left molar. I had a major abscess and a hidden root that my endodontist found. He said the RCT went perfectly and I was good to go. But I still feel some pressure on that side of my mouth in that area. Also when I press on my tooth with my tongue I can still feel the pressure of it. Sometimes its more sore than other times. When I sleep on that side of my face, I sometimes wake up and it will ache for a couple of hours. Post-op xrays show that the tooth looks good. And post-op visits all have been with the OK. I am still worried about why my tooth seems to still be achey and sore sometimes. Is this normal?