The pain that I am experiencing above the tooth in the lip fold and under the nose is it an infected tooth? I just had a crwon placed on this front tooth about 2 months ago. The tooth and above the gum did have some pain after the crown, but no redness of the gum, no swelling, and no tooth sensitivity and the pain subsided after an antibotic. Could there still be a need for a root canal? If not, what are some possibilities for the pain.