The causes of nosebleed in the morning and night may be the rupture of nasal mucosa, systemic diseases and so on. 1. Rupture of nasal mucous membrane: patients may easily rupture the nasal mucous membrane or increase the brittleness of nasal capillaries due to frequent picking of nostrils, dry air or rhinitis, curved septum, etc., which may lead to rupture of nasal blood vessels, thus leading to morning and evening nosebleeds. 2. Systemic diseases: such as high blood pressure, coagulation disorders, blood system diseases, abnormal liver and kidney functions, and hormonal abnormalities in women’s bodies may also lead to nosebleeds in the morning and evening. If you have nosebleeds in the morning and evening, you should consult a doctor in time to diagnose the specific cause of the disease and carry out treatment according to the cause of the disease.