I. Causes of nosebleeds: Children’s nosebleeds are mostly due to rhinitis, dry nasal mucosa, trauma, deviated nasal septum, etc. There are also a few for thrombocytopenia, leukemia, so for children with nosebleeds should be tested for routine blood tests, bleeding more to check the coagulation series, and even coagulation factors. Second, the treatment of nosebleeds 1, eat more vegetables, fruits. 2.Keep the nasal cavity clean and clear. 3.Treat the original disease.