Nasal bleeding is mainly caused by nasal trauma, rhinitis, sinusitis, nasal septum deviation, nasal tumor, systemic diseases and other reasons. 1. Nasal trauma: If the nose is hit, it is easy to cause nasal blood vessel rupture, causing nasal bleeding, often accompanied by nasal bone fracture, pain and other symptoms. 2. Rhinitis and sinusitis: when suffering from rhinitis and sinusitis, the mucous membrane of the nasal cavity will be congested, resulting in increased fragility of the capillaries in the nasal cavity, which will easily cause nasal bleeding. 3. Deviated nasal septum: the local mucous membrane on the side of deviated nasal septum is thinned with high tension, which is stimulated by airflow and leads to local mucous membrane erosion and bleeding. 4. Nasal tumors, such as hemangioma, nasopharyngeal fibroangioma, nasal sinus malignant tumor, nasopharyngeal carcinoma, etc., due to the tumor’s rich blood vessels, or the blood vessels in the nasal cavity are compressed or destroyed by the tumor, which can cause nasal bleeding. Nasal bleeding caused by nasal tumors is relatively large. 5. Systemic diseases: . Hypertension blood pressure is high or fluctuating, easy to cause the rupture of nasal blood vessels, there will be nasal bleeding. Blood diseases: patients with leukemia, hemophilia, thrombocytopenia and other blood diseases, liver and kidney diseases, coagulation dysfunction, easy to cause nasal bleeding. If you have nasal bleeding, you need to go to the hospital in time to find out the specific cause and treat it, so as not to delay the condition.