Hi, last year I did root canal in one of my teeth because of cavity and immediately after that I had to come to the Uk. I felt pain in the tooth for almost 1-2 months but I thought that could possibly because one side of my crown is little higher than the other side. Since this tooth is in lower jaw it might touch the other tooth on top. (I thought so after reading a few articles on net). I don't feel pain exactly in the tooth but it's kind of uncomfortable. I feel something like pain though not severe. After almost 2 months, the pain/discomfort gone totally. But again, now I am experiencing this discomfort from a couple of days. Is it because of the cold season or there could possibly an infection? Please guide me what should I do now. Many thanks in advance:)