Epistaxis is nosebleed, which is very common in daily life and can be caused by external stimuli or systemic diseases. To people’s normal work and life have brought great trouble, so epistaxis appears, should be timely treatment, symptomatic treatment of the premise is to find the cause of epistaxis, only to understand what triggered epistaxis, can do better treatment. Trauma Fracture of the nasal bone, nasal cavity, sinus trauma or nasal surgery can damage blood vessels and epistaxis occurs. Violent coughing, excessive nose blowing and excessive nose picking can also cause nosebleed. 1, Deviated nasal septum: it mostly occurs in the vicinity of the ridge or talonavicular process and the deviated protruding surface, because the mucous membrane at this place is weak and easy to be affected by cold and cold air, and the airflow will change the direction of flow in this place, so the mucous membrane becomes dry and easy to be ruptured and bleed. 2, nasal cavity, sinus and nasopharyngeal tumors: one of the most likely to occur nosebleed seen in the septum capillary hemangioma (known as hemorrhagic polyp), nasopharyngeal fibroma and nasal cavity or sinus malignant tumors often cause severe epistaxis. The authors met a female patient with repeated epistaxis many times, through the nasal cavity tamponade, although temporary bleeding, stretcher removal of tamponade gauze after bleeding reappeared, and finally biopsy pathologically confirmed as nasal cavity (nasal septum squamous cell carcinoma) cancer. 3.Rhinitis and nasal cavity specific infectious diseases: acute and chronic rhinitis, dry rhinitis can occur epistaxis, but usually bleeding is not much. Atrophic rhinitis often occurs when removing nasal crusts, digging the nose or blowing out the crusts with force. Nasal foreign bodies and nasal diphtheria, the onset of which is in children. The former is a one-sided epistaxis, the latter is often bilateral, and is mostly a small amount of bloody mucus. Pharyngeal tonsil hypertrophy is one of the causes of rhinorrhea in children, mostly as a result of secondary inflammation and congestion of the nasal mucosa, sinusitis, especially hemolytic streptococcal infection of acute maxillary sinusitis caused by rhinorrhea more. Epistaxis caused by chronic sinusitis is often overlooked. Systemic factors Nasal bleeding caused by systemic diseases is called symptomatic epistaxis, which can be the first and prominent symptom of some systemic diseases at some time. It is often caused by the following factors: (1) Blood vessels are involved in the disease. ② Changes in the composition or nature of the blood. Changes in blood pressure. Bleeding may be due to the rupture of small arteries or veins in the nasal cavity bleeding, may also be the mucous membrane of the nasal cavity multifocal capillary rupture bleeding, or perhaps the blood vessels are not broken, but the blood seeps out of the blood vessel wall (diapedesis) and the occurrence of multiple bleeding. Third, the bleeding site in the nasal cavity can occur in any part of the bleeding, but most of them are seen in the lower part of the nasal septum anterior, that is, the septum easy to bleed area. Because of the most abundant blood vessels, but also very superficial, anastomotic branches, vulnerable to trauma and dry airflow stimulation, and the lower part of the nasal septum before the cartilage, soft tissue is weak, when the mucous membrane is injured or swelling is not easy to dissipate, and thus it is easy to rupture the blood vessels. Sometimes bleeding can come from the back of the nasal cavity and the bottom part of the cavity, the bleeding is large, fierce, difficult to stop bleeding, mostly arterial hemorrhage or larger branch rupture caused. Venous hemorrhage from the posterior nasal cavity can be caused by rupture of the varicose nasal and nasopharyngeal venous plexus, which is common in the elderly with venous sclerosis.