Gum polyp is mostly caused by tooth decay, which is gradually caused by the gum growing into the cavity after the cavity is formed. The treatment should firstly remove the gum polyp, and then give the corresponding treatment with the size of cavity. If the cavity is shallow, remove the dirty material in the cavity and then perform the cavity filling. If the cavity is deep and touches the dental nerve, the cavity should be filled after the root canal treatment, and then the cavity should be wrapped with porcelain crown; if the cavity is very deep and has no preservation value, the affected tooth can be extracted and the denture should be restored after 2-3 months. Therefore, patients do not need to be afraid after finding gum polyp, they can recover after reasonable treatment.