Whether the tooth does not hurt needs to do root canal treatment needs to be decided according to the condition of the tooth, and can not be based on whether the tooth is painful or not as a basis for judgment. 1. If the tooth does not hurt, if there is a crack or cavity on the surface of the tooth, and the X-ray shows that the pulp is not exposed and there is no purulent secretion, the cavity can be repaired directly without root canal treatment. 2. If the tooth does not hurt but affects the nerve or caries, accompanied by purulent secretion, and has caused pulpitis, root canal treatment is required. 3. Root canal treatment is applicable to all kinds of endodontic lesions, which can remove the infected material of the replacement tooth, control bacterial growth, retain the affected tooth, and prevent the continued destruction of the alveolar bone Through systematic root canal treatment, the root inflammation of the tooth can be effectively removed, which is the ideal treatment method. When the tooth is decayed, it is important to consult the doctor in time and carry out the treatment under the guidance of the doctor.