The soreness when chewing after filling may be caused by the following situations: 1, the high point of the filling exists on the jaw surface, caused by the early contact when biting, a small bright point on the silver amalgam filling can be found during the clinical examination, and the tooth-colored material needs to use the occlusal paper to detect the high point, and then adjust and grind the early contact point of the filling, which can solve the problem; 2, the edge of the filling does not fit tightly: the edge of the cavity is poorly closed It can produce leakage, and the external stimulus will provoke the pulp through the gap, causing postoperative sensitivity, the situation needs to be re-filled and repaired; 3.Leakage of cavity: there may be caries in other parts of the tooth that have not been found, the situation needs to fill and repair the remaining cavity; 4.Chemical stimulation: when using acid etching solution to etch the dentin, if the acid etching solution is not rinsed clean, the residual acid etching solution will stimulate the pulp through the dentin tubules, the situation should be observed for a while if the symptoms are not serious. The situation will be observed for a period of time, if the symptoms are not relieved, the filling will be removed for pacification treatment; 5. Excessive jaw surface abrasion: the filling only solves the problem of cavity, but not the problem of jaw surface dentin allergy, the situation can be solved by desensitization in general.