Cavities have rotted empty tooth nerve pain is usually the occurrence of pulpitis, need to go to the hospital to do root canal treatment, due to this time the tooth hard tissue is missing more, generally recommended to follow up with a crown for protection. Tooth decay is medically known as dental caries. Caries can lead to destruction of tooth tissue and further development can lead to pulpitis. Root canal therapy is a common treatment for pulpitis, which involves the release of medication to kill the nerve and then filling the root canal after adequate root canal disinfection to completely remove the inflamed tissue and effectively treat pulpitis. As the tooth is “rotten and empty” due to caries, it means that there is a lot of missing tooth tissue, and after root canal treatment, further crown restoration should be done in order to avoid splitting of the tooth after root canal treatment. Once caries occurs, you should go to the hospital as soon as possible to avoid further development of the disease.