The causes of polyps on teeth are poor adjacency between two teeth, attachment of calculus to the root surface, formation of cavities on the adjacent surface of the teeth, cavities in the crown of the teeth are connected to the pulp cavity, long-term application of medication, etc., which are as follows: 1, poor adjacency between two teeth: the poor adjacency between two teeth, often embedded food fibers can cause recurrent swelling of gingival papillae, and the formation of polyps. 2, stone attachment to the root surface of the teeth: stone attachment to the root surface of the teeth can stimulate soft tissue proliferation and produce granulation tissue with a large amount of blood seepage. 3, formation of polyps on teeth: when a cavity is formed in the adjacent surface of the teeth and not repaired for a long time, the surrounding gums will produce granulation tissue with large amounts of blood. Stones, can stimulate soft tissue proliferation, produce granulation tissue, accompanied by a large number of blood seepage.3, teeth adjacent to the formation of cavities: teeth adjacent to the formation of cavities and long-term non-repair, the surrounding gums will enter the cavity, the formation of gingival polyps, the surface of its smooth, tough texture.4, the crown of the caries cavity and pulp cavity connection: the crown of the caries cavity and the pulp cavity connection, the pulp of the tooth in the bacterial chronic infection, resulting in the proliferation of fibrous tissue, and the formation of pulp polyp filled with 5, long-term application of drugs: long-term application of drugs such as phenytoin sodium, can make the gingival papillae and attached gingiva fibrous hyperplasia, presenting nodular, mulberry-like.