The causes of daily nosebleeds may be deviated nasal septum, leukemia and nasal lymphoma. 1. Deviated nasal septum: If the nasal septum is deviated, the mucous membrane of the deviated nasal septum is subjected to greater impact of airflow, which makes the blood vessels distributed on the mucous membrane of the nasal septum become sensitive and fragile, and when stimulated by the dry air, they will easily break and bleed, resulting in daily nosebleeds. 2. Leukemia: leukemia can cause coagulation dysfunction, because the bone marrow is filled with a large number of white blood cells, so that platelet production with coagulation function is reduced, which can cause the capillary wall in the nasal cavity to become brittle, a little bit of external stimulation, nasal blood vessels will rupture, and continue to bleed. 3. Nasal lymphoma: it is thought that the occurrence of this disease is related to infection or autoimmunity, etc. As the tumor cells will erode the mucous membrane inside the nose, leading to the rupture and bleeding of nasal capillaries, the symptom of daily nosebleed may appear. It is suggested that patients with daily nosebleeds should go to regular hospitals to find out the cause of the disease, and follow the advice of professional doctors to choose the suitable treatment for themselves.