Nephroblastoma in children is likely to cause nosebleeds in children. Nephroblastoma in children is most common in children aged 3~4 years old, which belongs to malignant tumor disease, and the common symptoms of children mainly include abnormal abdominal mass, abdominal pain, abdominal distension, blood pressure abnormality, hematuria, loss of appetite, etc. As a malignant tumor disease, the tumor cells may also metastasize to the liver, bones, lungs, etc. through blood type. As a malignant disease, tumor cells may also metastasize, for example, through the bloodstream to the liver, bones, lungs, etc. If liver metastasis occurs, it is possible that the tumor cells may metastasize to the liver. If liver metastasis occurs, it may lead to liver function damage, trigger blood clotting function disorder, resulting in impaired blood clotting mechanism, which may show related bleeding symptoms, such as nosebleed, vomiting blood and so on. Once diagnosed, children with nephroblastoma must be treated in a timely manner to avoid serious consequences.