For some time I have had problems with the upper left second premolar. When I pointed this out to my dentist, he X-rayed the tooth and said that I had exposed enamel, but otherwise there was nothing wrong with the tooth. Then, because of bleeding gums, I started seeing a periodontist, who performed the hygiene phase in May 2010 and then flap surgery in all four quadrants in August and September 2011. In May 2012 they cleaned dental calculus at the periodontist. After that this tooth became very sensitive and painful. I visited my dentist, who opened the tooth and replaced the filling, and said everything was fine with the tooth. After a few days severe pain developed. I visited the emergency dentist, who opened the tooth and cleaned the canals (25-trepanation; B-19, P-17; Calosept, Cavit). This was repeated several times until August 2012, when the dentist believed the tooth had healed and filled the canals and closed the tooth. A few days later severe pain started. I was given Amoksiklav 1000. It was fine for a while, then the pain returned. In November 2012 the filling was removed. In December 2012 the canals were cleaned again, medication was inserted and the tooth was temporarily closed. After a few days I developed swelling and the tooth hurt. They again removed the temporary closure and cleaned the canals — very painful. On 22 December 2012, pain again, swelling and a pus-filled bump above the tooth. Again Amoksiklav 1000, two boxes. Please give me your advice. Kind regards.