A low nose bleeding, may be too dry with the nasal cavity, may also be due to nasal lesions, blood diseases and other reasons. 1. Nasal cavity is too dry: if you stay in the air too dry environment for a long time, resulting in the nasal mucosa dry and dehydrated, resulting in the nasal mucosa parts of the capillary fragility increased. In this case, the nasal cavity by a slight stimulus, may cause the nasal mucosa in the capillary rupture, resulting in a low nose bleeding. 2. Nasal lesions: such as acute and chronic rhinitis, sinusitis, nasal septum deviation, nasal hemangioma and nasal malignant tumors, etc., may lead to nasal mucosa rupture bleeding, resulting in a nose bleed when you look down. 3. Blood diseases: common in hemolytic anemia, leukemia, hemophilia and other diseases, may lead to frequent nose bleeding, and it is difficult to stop, and the coagulation mechanism is abnormal. A low nose bleeding, may also be caused by other reasons, if the symptoms of frequent recurrence, or a combination of other discomforts, you should seek medical attention as soon as possible, after a clear diagnosis, give targeted treatment.