Diabetic patients have been nosebleeds may be caused by environmental factors, but also may be caused by high blood sugar leading to slow wound healing, bleeding disorders, nasal diseases, etc. It is recommended to go to the hospital, improve the relevant examination, clear the cause of the symptomatic treatment. 1. Environmental factors: less moisture in the air, resulting in a decrease in humidity can cause dry nasal mucosa, which can easily lead to capillary rupture and bleeding. You can increase the air humidity to keep the nasal mucosa moist. 2. High blood sugar: diabetic patients with poor long-term blood sugar control, wound healing is slower, bleeding is prone to recurrence. Should adhere to regular glucose-lowering treatment, such as diet, exercise, medication and so on. 3. Bleeding disorders: such as primary immune thrombocytopenia, leukemia, hemophilia, etc., leading to abnormal coagulation function, causing nosebleeds all the time. Coagulation function, bone marrow aspiration biopsy and other related examinations should be perfected, and symptomatic treatment should be provided. 4. Nasal diseases: Nasal inflammation, foreign body in nasal cavity, nasopharyngeal cancer and other diseases can also cause nosebleed. It is recommended to go to the hospital to improve the relevant examination when nosebleed occurs.