Teeth hurt when drinking water, eating hot or cold, oral examination should be conducted and oral radiographs should be taken. If there is a deep wedge-shaped defect in the cervical region of the tooth caused by long-term lateral brushing, the cavity should be prepared and sealed with zinc oxide in clove oil for soothing and analgesic, and after the symptoms are relieved for 1-2 weeks, the tooth can be repaired with glass ionomer cementum or composite resin. If there is a deeper crack in the tooth, which causes pain in the pulp when exposed to temperature stimulation, it is necessary to remove the pulp under local anesthesia and fabricate a full crown restoration after completing root canal treatment to avoid splitting the tooth. If the whole mouth suffers from periodontal disease, causing alveolar bone resorption, gum recession, exposing the root of the tooth, it is necessary to complete the periodontal flap implantation for the teeth with obvious pain after the basic periodontal treatment to restore the height of the gums.