Tooth extraction is not recommended for painful tooth decay because it is not an indication for tooth extraction. Tooth decay, also known as dental caries, causes pain that can be completely treated to preserve the tooth. Every tooth that erupts normally and serves the function of chewing in the mouth is a very important chewing unit for us, and the loss of any normal tooth is irreparable for us. In the principle of the overall treatment of the oral cavity, the teeth that can be preserved should be preserved as much as possible, and only when the teeth must be extracted, we will consider extracting the teeth, and the toothache caused by tooth decay is far from the stage that the teeth must be extracted. Generally, most of the tooth pain caused by tooth decay is reversible pulpitis or pulpitis, in these cases, the decayed part of the tooth can be removed by removing the decayed and decayed part of the tooth, or directly applying root canal treatment to treat the decayed tooth pulp. Finally, the crown of the decayed tooth should be protected by crown restoration so that the tooth can continue to serve the chewing function for a long time instead of extracting it.