The first time I went to the dentist about my current problem was in June, but the dentist I went to told me that the problem was my wisdom tooth pushing on my other tooth, and prescribed amoxicillin, and ibuprofen 600mg. The unpleasant sensation subsided, and subsequently I had my wisdom tooth removed, and was again prescribed amoxicillin. In September the same symptoms started again, and another dentist said it was the tooth that I had root canal in 5 years ago had an infection and gave me penicillin, advising to perform the operation again. The pain subsided, but I did not follow the course of antibiotics properly. Three weeks later I went back to Bulgaria and saw two different dentists who both told me the route canal was perfect, and nothing else is visible on the X ray. I had my top wisdom tooth removed, but that was not the cause of the sensation. I recently went to a different dentist, and she too could not find anything, and gave me (metrazanol?), and the pain subsided but has recently begun again. I have also been to see doctors and an ear specialist. A doctor recently prescribed me a course of doxycycline to see if that has any effect. I am really worried about antibiotic resistance, but the area affected is definitely responsive to antibiotic treatment. The symptoms are an unpleasant sensation in the lower left area of my mouth where I have had root canal. Slight facial swelling and pain in my ear, particularly if pressed behind. The unpleasant sensation is hard to describe, but it definitely is not a sharp pain, but more of a light throbbing, dull sensation. Furthermore, sometimes when it is particularly bad, my ear feels as if it is wet inside, but is not.