Frequent nosebleeds in adults may be related to bad habits, deviated nasal septum, nasal capillary hemangioma and acute leukemia and other causes and diseases. 1. Unhealthy habits: Frequent and forceful nose picking can gradually damage the nasal mucosa, and sometimes inattention to nose picking can lead to rupture of blood vessels in the nasal mucosa, thus triggering nosebleeds. 2. Deviated nasal septum: the thin mucous membrane in the top part of the convex surface, bone spine or bone ridge of the deviated septum is easily stimulated by dust or airflow repeatedly, which may lead to mucous membrane erosion and thus have nosebleed. 3. Nasal capillary hemangioma: because capillary hemangioma is composed of most capillaries, it is easy to bleed, so there can be repeated episodes of nosebleed, and there is also progressive nasal congestion in the bleeding side of the nasal cavity. 4. Acute leukemia: due to a large number of leukemia cells in the blood vessels stagnation infiltration and thrombocytopenia, coagulation abnormalities and other mechanisms can cause bleeding, including nosebleeds, skin bruises, bruises, gum bleeding and so on more common. Those who have long-term recurrent bleeding are recommended to consult a doctor in time, actively search for the cause of the disease, and treat the cause and symptoms.