The common reasons for patients to have symptoms of bleeding nose include inflammatory infection, allergy, dry nasal cavity, deviated nasal septum, nasal hyperplasia, systemic diseases, etc., as follows: 1. Inflammatory infection and allergy: often related to inflammatory infectious and allergic disease factors in the nasal cavity, patients may have acute and chronic rhinitis, acute and chronic sinusitis, allergic rhinitis, etc. 2. Dry nasal cavity: some patients may also have dry nasal mucosa. 3. The patient’s nasal mucosa may also appear drier, which can easily cause local mucosa erosion, ulceration, and repeated bleeding. 3, nasal septal deviation and nasal hyperplasia: Some patients may also have a significant deviation of the nasal septum, or the nasal tract further appears hemangioma, bleeding polyps, papillomas and other bleeding-prone hyperplasia, which can also easily trigger the occurrence of old bleeding symptoms. 4, systemic diseases: some patients may also have systemic disease factors, including hypertension, diabetes, blood system diseases, liver and kidney diseases, etc., if necessary, further detailed examination is needed to distinguish the cause.