Getting up in the morning with a bloody nose may be due to dry air, nasal diseases, blood system diseases, etc. 1. Dry air: when the air is too dry, it can lead to dry nasal mucosa rupture and bleeding, if the surrounding air is polluted by irritating gases, nosebleeds can also occur. It is recommended to avoid the air too dry before going to bed, you can put pots of water, wet towels or humidifiers in the room. 2. Nasal diseases: when there are rhinitis, sinusitis, allergic rhinitis and other diseases, the nasal mucosa can be stimulated by inflammation with more secretion, vigorously blowing the nose or picking and scratching will result in mucosal bleeding, and should be followed by the use of medication. In serious cases, there are malignant tumors of nasal cavity, such as nasopharyngeal carcinoma, etc., which need to improve nasal endoscopy in time to clarify. 3. Blood system diseases: If there are leukemia, aplastic anemia, hemorrhagic purpura and other diseases, it will cause the coagulation mechanism to be damaged by the phenomenon of nosebleeds. It is recommended that the indoor air humidity is appropriate, timely to the hospital, under the guidance of the doctor to standardize the treatment, to avoid blindly use their own medication.