Children often have nosebleeds, clinically there may be the following reasons: the first reason, local inflammatory stimulation of the nasal cavity, common rhinitis, allergic rhinitis, dry rhinitis, sinusitis and other related diseases, resulting in local mucous membrane of the nasal cavity prone to erosion, local vasodilation and thus prone to bleeding. The second reason is that the local climate may be dry and the temperature is relatively high, which may also induce nasal bleeding. The third reason is that some children may be picky eaters and seldom eat vegetables and fruits, and often suffer from constipation, which may increase the brittleness of the nasal mucosal vessel walls and cause bleeding. The fourth reason is that some children have abnormal nasal anatomy, such as deviated nasal septum, where the nasal septum is deviated and protrudes, and the long-term stimulation of airflow can easily induce local bleeding. The fifth reason is that some children have trauma to the nose, which can easily induce local mucosal tearing in the nasal cavity and thus induce nasal bleeding. The sixth reason is that some children have blood-related diseases, such as thrombocytopenia, coagulation factor deficiency and other related diseases, which may also trigger nasal bleeding.