The first thing that should be common in adolescents with nosebleeds is bleeding from the nasal septum Ri area; this bleeding is small and can be stopped by simple self-caulking or pressure on the nasal cavity; examination often shows erosion of the front of the nasal septum with dilated blood vessels. Treatment can be done with absorbable hemostatic gauze patches to promote growth of the trauma, along with the use of oil-based nasal drops. Secondly, rupture of other arterial vessels in the nasal cavity: the amount is larger, and it is difficult to stop the bleeding with caulking, even with hospital caulking. Nasal endoscopy is needed to find the bleeding point and stop the bleeding with radiofrequency; as long as a clear bleeding point is found, the effect is exact after hemostasis, and caulking and hospitalization are not needed. Nasal mass: often accompanied by symptoms such as runny nose and nasal obstruction, the most common one is nasopharyngeal fibrovascular tumor, which needs to be diagnosed by radiographs, CTMRI, etc. and requires surgery. In advanced stage, it will invade the skull base and orbit, which is extremely difficult to operate and requires treatment in large hospitals. If the surgery is not well-prepared, the bleeding will be extremely large and difficult to stop, and the patient’s life will be in danger. A formal hospital examination is needed to confirm the diagnosis and determine the appropriate surgical plan. Other patients with blood diseases, such as leukemia and hemophilia, may also show nosebleeds in the early stage, but they are often accompanied by bleeding from other parts of the body, such as bleeding gums, and require blood-related tests to confirm the diagnosis. Although the incidence of internal carotid artery pseudoaneurysm after severe head trauma is extremely low, the bleeding is often fatal. Our hospital once encountered three such patients, two of whom had stent repair and one of whom died of hemorrhage in the treatment room at that time.