Hypertension does not always cause nosebleeds, but it is common to see patients with nosebleeds in the outpatient clinic who go to the cardiology department during outpatient visits. There are several reasons for nosebleed: 1, the important reason is high blood pressure, high blood pressure and blood pressure fluctuation is very big, it will cause nasal mucosa blood vessel rupture and cause nosebleed, it should be actively lowering the blood pressure to make the blood pressure stabilize, the bleeding may stop. 2, nasal mucosa, nasal blood vessel has deformity, ulcer caused by bleeding, it should go to otorhinolaryngology specialists. 3, some patients with high blood pressure based on the combination of hematological system diseases, such as hemophilia, thrombocytopenia, etc., if the blood pressure is not high, it will also cause the bleeding to the cardiology department. Hemophilia, thrombocytopenia, etc., if the blood pressure is not high, can also cause nosebleeds, may also be combined with increased blood pressure, blood system disorders caused by nosebleeds, but also need to actively go to deal with. There are 3 clinical conditions of nosebleed: 1, nosebleed caused by high blood pressure, 2, nosebleed caused by blood system diseases, thrombocytopenia, 3, nosebleed caused by nasal mucosa, nasal blood vessels with deformity, ulceration. Nosebleed patients should be actively further examination, screening causes in order to better further treatment.