Boys with nosebleeds should consider the following aspects: 1, nasal anatomical structure abnormalities: such as nasal septum deviation or nasal septum Ri area vascular structure disorder, resulting in rupture and bleeding, should be consulted in the ENT department to observe whether there is nasal development or structural abnormalities, if present for surgical correction can be; 2, hematological system diseases: should be treated in the hematology department to see whether there is idiopathic thrombocytopenic purpura ( ITP), or malignant diseases such as leukemia, both of which are due to a decrease in platelets, resulting in reduced coagulation and nosebleeds; 3. Hemophilia: The hereditary disease hemophilia is caused by a lack of certain factors in the body, and the vast majority of patients are boys, while girls are extremely rare. If a boy has a nosebleed, it is recommended to go to the ENT and hematology departments of the hospital for examination, except for these basic abnormalities will generally not be too big a problem and will not cause too much harm to the human body.