Drugs that kill nerves are put in the teeth. It didn't hurt for a few days at first, but it hurt a little later. After changing the medicine, my heart still hurts. What's going on?
It may be periapical periodontitis caused by arsenic, that is, putting nerve-killing drugs in the medullary cavity, slowly killing the tooth nerve, from top to bottom, until the apical part. At this point, the drugs that kill nerves must be removed. If it exceeds the time, it will cause tissue necrosis outside the apical part and cause pain. This kind of periapical periodontitis caused by arsenic is troublesome to treat, and changing medicine once or twice can't solve the problem, so be patient, change medicine more and get better slowly.