Nosebleeds in babies are not necessarily due to leukemia, but can also be due to nasal trauma and other diseases, and need to be analyzed for specific reasons. In case of acute leukemia, the baby may have symptoms of nosebleed, but it will be accompanied by high fever, anemia, skin petechiae, bleeding gums, and in serious cases, intracranial bleeding and gastrointestinal bleeding may occur, and blood routine, coagulation function and bone marrow aspiration tests are needed to make a clear diagnosis. In addition to leukemia, dry weather, nasal injury, deviated nasal septum, nasal inflammation, nasal foreign bodies and tumors in the nasal cavity, sinuses and nasopharynx may cause nosebleeds, and it cannot be simply assumed that nosebleeds are suffering from leukemia. If a baby has frequent nosebleeds, parents are advised to take the child to the ENT department or hematology department in a timely manner. Usually, try not to let the child pick his nose, pay attention to increasing air humidity, and give the child timely hydration.