Cavity pain is the pain caused by caries, and you need to choose filling treatment, root canal treatment or extraction according to the depth of caries. 1. Filling treatment: It is mainly used for teeth whose caries has not affected the pulp, which manifests itself as pain from food impaction, hot and cold stimulation, but the pain disappears immediately after removing the decayed tissues. Generally, filling can cure the tooth after removing the decayed tissue. 2. Root canal treatment: It is mainly used for teeth whose caries has reached the pulp but can be preserved, mainly manifested as hot and cold stimulation pain, the pain continues after the stimulation is removed, and sometimes there are symptoms such as night pain or biting pain. Root canal treatment is needed to remove the decayed tissues and infected pulp, and then filling. 3. Extraction: mainly when the caries has led to obvious defects or perforation at the bottom of the tooth, and there is no preservation value. It can be extracted directly. It is recommended to go to a regular hospital stomatology department, according to the degree of caries, choose the appropriate treatment plan.