The first thing to do is to check whether the filling material has occlusal high spots after the filling. Because the occlusal pain is largely caused by having high spots and early contact, you can use occlusal paper, put it on top of the filling material, and instruct the patient to bite and grind the teeth to check the location of the specific filling high spots, and apply the grinding drill to grind the high spots away. And you can appropriately lower the bite of the filling material, so that it no longer appears to bite the position, through this way can make the bite pain to get greater relief. However, there is another kind of occlusal pain in the clinic, it is possible to misjudge the condition of the pulp before filling, thus appearing periapical periodontitis, then it is necessary to remove the filling material for the secondary treatment of the root canal.