The most common clinical disease is gingivitis, brushing teeth with blood is a common clinical complaint, along with the patient complains of biting fruit, the corresponding blood stains will remain on top of the fruit, all of which are called bleeding under the stimulation of the situation, is a typical manifestation of gingivitis. Gingivitis is the most common oral periodontal disease, the typical symptoms are red, swollen, loose gums and bleeding, the most common manifestation of this bleeding is bleeding under the stimulus. The cause of gingivitis is mainly due to poor periodontal hygiene, periodontal presence of a large number of plaque and calculus, a large number of bacterial deposits over time, the formation of gingivitis, and further produced by bleeding gums.