Frequent nosebleeds may be related to chronic rhinitis, chronic sinusitis, deviated nasal septum, nasal hemangioma, tumors, blood system diseases. It is recommended to go to the ear, nose and throat department of the hospital as soon as possible for examination and standardized treatment after a clear diagnosis. 1. Chronic rhinitis: chronic rhinitis patients with long-term congestion and edema of the nasal mucosa, vasodilatation, may rupture bleeding. 2. Chronic sinusitis: it may be due to bacterial, viral infection caused by nasal sinus infection, repeated infection may cause capillary expansion, easy to break bleeding, with the phenomenon of nosebleed. 3. Deviated nasal septum: when the bone and cartilage of nasal septum is C-shaped or strip ridge-like protrusion, the local mucous membrane is thin and tense, and the mucous membrane is easy to break and there is nosebleed. 4. Nasal hemangioma: due to the abundant blood vessels under the mucosa of nasal cavity and sinuses, it is very easy to form hemangioma, which is often manifested as repeated nosebleeds, and the bleeding volume is usually related to the size of hemangioma. 5. Tumor: Tumor in nasal cavity, sinus, nasopharynx, etc., tumor cells will invade the surrounding tissues, which may often cause nosebleed. 6. Blood system diseases: Suffering from thrombocytopenia, leukemia and other diseases will cause coagulation dysfunction, which may cause frequent nosebleeds. Frequent nosebleeds can also be seen in nasal foreign bodies, hypertension, chemicals and drugs poisoning, etc. Therefore, patients are advised to consult the doctor in time to avoid delaying the condition.