Nosebleed is considered to be related to nasal foreign body, atrophic rhinitis, deviated nasal septum, nasopharyngeal carcinoma, leukemia and so on. 1. Nasal foreign body: when there is a foreign body in the nasal cavity, it can bleed due to the erosion of nasal mucous membrane, which is manifested as nosebleed all the time. 2. Atrophic rhinitis: endocrine dysfunction, autoimmune disease, nasal medical injury can induce atrophic rhinitis. The main manifestations of patients are dryness of nasopharynx, nasal congestion, loss of sense of smell or loss, etc., and some patients will always have nosebleeds. 3. Deviated nasal septum: the disease will cause some patients to have nosebleeds all the time, and it is easy to be accompanied by nasal congestion, headache, tinnitus and other symptoms. Deviated nasal septum is related to developmental abnormality, trauma, nasal tumor and other factors. 4. Nasopharyngeal cancer: belongs to malignant tumor, easy to cause nosebleed in some patients. The cause of nasopharyngeal cancer is still unclear, which may be related to EBV infection, genetic factors, etc. Typical symptoms of patients include nasal congestion, tinnitus, hearing loss, local lymph node enlargement and so on. 5. Leukemia: also belongs to malignant tumors, which can cause patients to have nosebleeds all the time. The cause of leukemia is not completely clear, it may be related to genetic factors, physical factors, chemical factors, etc. Patients may show low fever, skin ecchymosis, local lymph node enlargement, etc. There are many causes of constant nosebleeds, such as acute rhinitis, sinusitis, aplastic anemia and so on. It is recommended that patients seek medical examination in order to clarify the cause of the disease and then follow the doctor’s instructions for treatment.