The tooth decay is called tooth decay, and the pain of tooth decay can be divided into two cases: 1. In this case, the tooth nerve is not yet involved or it is only close to the nerve, so you can clean the cavity and fill it up with filling material to relieve the symptoms; 2. This kind of pain usually involves the dental nerve, which needs to kill the nerve to do root canal treatment, and then the subsequent need to do crown restoration treatment. In general, if a patient has the above two different kinds of pain, he should promptly seek medical examination and treatment to avoid further development of the lesion causing more damage to the tooth.