The polyp in the cavity is divided into the following cases: 1, the polyp caused by the gum papilla between two teeth, in this case, you can use an electric knife or surgical blade to remove and trim the shape of the gum. In this case, the gum can be removed with an electric knife or surgical blade, and the gum can be reshaped, and the filling material can be used to restore the adjacent relationship between the teeth, so that the gum will not grow again. 2, the polyp in the cavity may also be caused by a pulpal polyp, which has exposed the nerve, and can be cured by removing the nerve and the hyperplastic polyp and doing thorough root canal treatment. 3, the polyp in the cavity, if the tooth has penetrated the bottom. The polyp that appears in this case needs to be extracted from the tooth, and the polyp will be eliminated naturally when the wound heals. In addition, the process of tooth extraction may also bring out the polyp directly, which does not need to be treated and only requires routine local disinfection.