Nosebleeds in children 3 times in a week may be caused by frequently digging the nostrils with the hands, or may be caused by diseases, such as leukemia and other blood system diseases. Frequent digging of the nostrils with the hands can easily lead to damage to the capillaries of the nasal mucosa, which in turn leads to the occurrence of nosebleeds. In addition to the above reasons, it may also be due to diseases that cause children to have nosebleeds 3 times a week. Common diseases include leukemia, idiopathic thrombocytopenic purpura, hemophilia, etc., which is mainly caused by the child’s clotting function disorder. When a child has frequent nosebleeds, he or she should go to a regular hospital for a complete examination and treatment under the guidance of a doctor.