Nose bleeding is a common symptom and a common disease in otorhinolaryngology. There are many causes of nasal bleeding, and the main thing is to find the cause of nasal bleeding in order to carry out effective treatment. Nasal bleeding can be caused by local causes in the nasal cavity or by a variety of systemic diseases. External stimulation by adverse factors, polluted environment, dry climate, heat or cold, etc. can cause nasal bleeding. The common local causes of nasal bleeding include: inflammation of the mucous membrane of the nasal cavity and sinuses, nasal capillary hemangioma, deviated nasal septum, dilated capillaries in the anterior segment of the nasal septum; nasal trauma due to various causes; nasal tumors, etc. Systemic factors leading to rhinorrhea, such as upper respiratory tract infection, cardiovascular diseases, various infectious diseases of the upper respiratory tract, hematologic diseases and malnutrition, are common. Rhinorrhea in different age groups has its own characteristics. In children, nasal bleeding is mainly due to inflammation of the nasal mucosa, but it may also be due to foreign bodies in the nasal cavity, damage to the nasal mucosa caused by children who like to dig their noses, or vitamin deficiency caused by picky eating; in young men, nasal bleeding is common, and the bleeding volume is large, with fibrovascular tumors in the nasopharynx; in middle-aged and elderly people, a small amount of bleeding is mainly due to malignant tumors; bleeding volume is large, and cardiovascular diseases or long-term use of anticoagulants are common. Treatment of nasal bleeding, in the case of bleeding, is mainly carried out to stop bleeding. There are finger pressure method, bleeding point cautery method, nasal cavity filling and nasal endoscopic bleeding point laser, microwave and other hemostatic treatments. In case the cause of bleeding is found, the treatment needs to be tailored to the cause.