A bad tooth may have to be pulled .患者:医生,我牙龈上长了个包,有一颗坏牙可能需要拔掉。医生:唔,你这牙旁边长了个脓肿。必须切开把脓放出来。医生:是的,你这牙已经坏了,无法修补,需要拔掉。但要等炎症消了以后才能拔。今天先在牙上钻个小洞将脓引流出来,这样可以止痛。患者:你看着需要怎样做就怎样做吧!医生:我先给你打一针麻药,你以前注射过麻药吗?患者:没注射过。Please come back again tomorrow to have the drain replaced ......