There are several kinds of dental polyps for children: 1, gum polyp: mainly due to the rough edge of tooth decay, stimulating gum hyperplasia, and then causing gum polyp; 2, periodontal membrane polyp: mostly seen in posterior teeth, multi-root teeth, caries reaches root bifurcation, stimulating periodontal membrane, causing periodontal membrane hyperplasia; 3, pulp polyp: mostly seen in young permanent teeth or milk teeth, because the blood is richer, pulp inflammation caries stimulates pulp, causing hyperplasia Pulpitis, pulp tissue hyperplasia. All kinds of pulp polyps should firstly determine the cause, and then deal with the cause.