Pulpitis in molars can be painful and requires dental treatment. During the treatment of pulpitis, the first step is to use a drill to remove the infected dentin and bone. If the dental nerve is exposed and the inflammation of the pulp is severe, a nerve-killing treatment can be conducted. In cases of acute inflammation, it is necessary to first open up the tooth. Once the inflammation subsides, nerve-killing treatment can proceed. Otherwise, the pressure is too great and the pain may intensify. If the pain is unbearable during the drilling process in the treatment of pulpitis, local anesthesia can be administered to the tooth. Once the anesthesia takes effect, the pain will be significantly less during the drilling stage.