Frequent nosebleeds in children can be considered to be related to deviated nasal septum, rhinitis, blood system diseases (e.g. leukemia) and other reasons. 1. Deviated nasal septum: the uneven development of the bones forming the nasal septum, nasal trauma and other reasons can lead to the formation of deviated nasal septum, due to the thin mucous membrane on the convex side of the deviated surface, it is easy to be stimulated by dust or airflow, resulting in nasal mucous membrane erosion and thus the formation of nosebleeds. 2. Rhinitis: such as atrophic rhinitis, which can affect the development of the external nose since childhood, the disease has atrophy and degenerative changes of the nasal mucosa, the nasal mucosa is thinned due to atrophy, when blowing the nose or digging the nose with force, it can lead to rupture of the nasal capillaries, resulting in rhinorrhea. 3. Blood system diseases: such as leukemia children, due to thrombocytopenia, coagulation dysfunction, there may be bleeding manifestations, there will be skin bruises, bruises and nosebleeds, bleeding gums and other manifestations. Children with frequent nosebleeds, it is recommended to go to the hospital specialist in a timely manner, improve the nasal endoscopy and coagulation function and other related examinations, to determine the cause of the disease, and then treat the cause of the disease.