Tooth pouring is an indication of dentin hypersensitivity, the symptom is when eating sweet and sour food, the teeth appear sour and weak symptoms, treatment methods are as follows: first, after cleaning the tooth surface using desensitizing toothpaste application, on the tooth surface and root, stay for about twenty minutes and then rinse the mouth, to achieve the role of sealing the dentin tubules, to relieve the symptoms of tooth pouring; second, go to the hospital to apply fluoride on the tooth surface, fluoride desensitization; Third, use laser desensitization to treat dentin hypersensitivity. The frequent occurrence of inverted teeth indicates the existence of root exposure, or the condition of tooth tissue defect, such as suffering from periodontitis, dental caries, cervical wedge-shaped defect or hidden fracture of teeth, etc. The teeth need symptomatic treatment in order to solve the problem at root, such as the filling of cavities for patients with dental caries, and patients with root exposure caused by periodontal disease need to do ultrasonic scaling and periodontal scaling.