Nasal mucous membrane damage, dry rhinitis, nasal septum deviation and other causes, can be improved through general treatment, surgical treatment. 1. Nasal mucous membrane injury: frequent nose picking can easily lead to rupture of nasal mucous membrane blood vessels, triggering nosebleeds, nasal blood coagulation and the formation of blood crusts. Patients should stop digging the nose, change the bad habits, use saline to clean the nasal cavity, do not use your hands to pick out the scabs directly, so as not to cause the nasal mucosal blood vessels rupture again, resulting in nosebleeds. 2. Dry rhinitis: the nasal mucosa of patients with this disease is dry, congested and crusted, and there may be localized blood seepage after the scabs fall off, and then there are bloody scabs in the nostrils. Patients need to improve the quality of the environment, increase the humidity of the room, and stay away from dusty places, and at the same time, they can also use saline to clean the nasal cavity, and give compound menthol nasal drops and cod liver oil nasal drops. 3. Deviated nasal septum: Deviated nasal septum is caused by abnormal development of nasal septum. If the nasal septum bleeds repeatedly, surgery is needed to remove part of the cartilage and bone of the nasal septum, so as to improve nasal bleeding and then improve the phenomenon of bloody crusts in the nostrils. In addition, allergic rhinitis, sinusitis and other nasal diseases can also lead to the phenomenon of bloody nostrils, it is recommended that the patient actively consult a doctor to clarify the diagnosis, and comply with the doctor’s instructions for medication and treatment.