Nosebleeds may be caused by dry nasal mucosa, which can be cleaned locally; it may be caused by hemangioma in nasal cavity, which can be treated by interventional therapy; and it may be caused by blood system diseases. 1. Dry nasal mucosa: the weather is dry in winter and spring, the child’s nasal mucosa will also be dry, long-term dryness will easily lead to nosebleeds. When the child has a nosebleed, it should be washed in time, and after that, it should be pressed to stop bleeding, please don’t tilt the head to prevent the nosebleed from being inhaled into the respiratory tract. 2. Nasal fibrous hemangioma: when the child suffers from nasal hemangioma, the blood vessel wall of hemangioma is brittle and easy to rupture and bleed. Nosebleeds caused by nasal hemangioma can be treated with interventional therapy. 3. Blood system diseases: immune thrombocytopenia and leukemia and other diseases can also lead to recurrent nosebleeds, which require timely medical treatment, according to the cause of the disease, to be supplemented with platelets, glucocorticoid anti-inflammatory, chemotherapy and other treatments. Nosebleeds can also have other causes, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment.