Nosebleeds in adults may be caused by factors such as dry living environment, rhinitis, deviated septum, nasal tumors, trauma and other causes, as well as high blood pressure, leukemia and other systemic diseases. If the patient can’t get relief from repeated nosebleeds, he should consult a doctor in time and standardize the treatment under the doctor’s guidance. 1. Environmental dryness factor: living environment air dry, high temperature, etc., leading to the lack of moisture in the nasal mucosa, easily cause mucosal brittle cracks, resulting in nosebleeds. 2. Local diseases of nasal cavity: such as rhinitis, nasal septum deviation, trauma, nasal tumor, etc., often due to the thinning of the nasal mucosa or mucosal lesions, which can easily cause mucosal rupture, leading to nosebleed. 3. Systemic diseases: common in hypertension, thrombocytopenic purpura, long-term application of anticoagulant drugs and other diseases. It is necessary to actively treat the primary disease in order to effectively treat nosebleed. It is recommended that patients with nosebleeds go to the ENT department of the hospital as soon as possible to find out the cause of the disease and then actively treat it, so as not to cause serious adverse consequences.