Tooth decay pain may require cushion filling, root canal treatment or extraction, it is recommended to go to the hospital for specific examination and treatment. 1. If the decayed tooth is painful with hot and cold stimulation, the radiograph does not show the nerve, and the stimulation can be quickly relieved by removing it, you can remove the decayed portion, and then cushion and fill the tooth, and do indirect pulp capping if necessary. 2. For the temperature stimulation persistent pain, spontaneous pain can be root canal treatment, after the tooth pulp cavity is opened, clean the pulp cavity and root canal infected pulp, preparation and shaping, root canal disinfection, to eliminate inflammation, root canal filling, and then crown restoration. 3. Cavities that are splitting and causing pain can be extracted; wisdom teeth with painful cavities can be extracted; painful cavities in milk teeth that are about to be replaced can be extracted.