In general, children are not prone to periodontitis, and only a very small number of people have periodontitis of the milk teeth, and the incidence is very low. Only in 1983, a man named Page found five cases of periodontitis in papillary teeth, so he named the periodontitis that occurs in the papillary teeth, called prepubertal periodontitis, the specific cause of the disease is unclear, may be related to microbial factors, microbial infection, viruses, local irritation factors, and family genetic factors. Microbial factors may be associated with concomitant Actinobacillus actinomycetemcomitans colonization, Porphyromonas gingivalis, and viral infections. Periodontitis has a strong family heritability and family aggregation, and the exact mode of inheritance is not known. If prepubertal periodontitis occurs, basic periodontal treatment needs to be improved and oral hygiene care needs to be maintained later. Most parents find that their children’s gums bleeding, in fact, is not periodontitis, but only gingivitis caused by plaque stimulation, if there is tartar for supragingival cleaning, if it is simple soft tartar, can be improved by brushing or to the hospital medical institutions for periodontal basic treatment, gum bleeding symptoms.