The causes of a piece of meat on the tooth, including incomplete eruption of wisdom teeth, chronic periapical inflammation, etc., are as follows: First, when the wisdom tooth eruption is incomplete, the distal mesial gingiva will cover the maxillary surface, forming a gingival flap, which is constantly proliferating or forming ulcers under the stimulation of mastication. Secondly, when chronic apical periodontitis occurs in the teeth, a large amount of inflammatory secretions from the roots can penetrate the bone wall and form fistulas or sinus tracts on the gingival surface. Third, when food fibers are often embedded between teeth, it will cause repeated swelling of the gums and formation of granulation tissue. Fourth, when the crown of the tooth forms a deep cavity, if not filled in time, the neighboring gums will proliferate to form polyps, filling the cavity with a smooth surface. Fifth, the frequent use of drugs such as phenytoin sodium can cause fibrous hyperplasia of the gums, which is nodular or mulberry-like.