The cause of nosebleeds may be dry rhinitis, deviated nasal septum, thrombocytopenic purpura, etc. It is necessary to make a clear diagnosis and then carry out targeted treatment under the guidance of the doctor, such as medication and surgery. 1. Dry rhinitis: frequent nosebleeds in children may also be caused by dry rhinitis. It is mainly due to the dry environment in which the child is located, triggering the functional abnormality of the mucous membrane of the nasal cavity, so that the child has the above discomfort. The child can use saline to moisten the nasal cavity under the guidance of the doctor, usually need to pay attention to the temperature and humidity of the room, if necessary, can use a humidifier to humidify. 2. Deviated nasal septum: When a child suffers from deviated nasal septum, it may lead to local nerve damage, which may lead to frequent nosebleeds. At this time, the child can use septoplasty, septum correction and other surgical procedures under the guidance of a doctor to carry out effective treatment. 3. Thrombocytopenic purpura: Due to the low platelet count in the body, the skin, nasal cavity and internal organs often bleed, and it needs to be diagnosed by blood routine and anti-platelet autoantibody test. If the child bleeds severely, bed rest, use glucocorticosteroids under the guidance of the doctor to improve, if necessary, transfuse platelets for treatment. This symptom alone is not enough to diagnose the disease, do not rule out that it is caused by other factors, it is recommended to take the child to the clinic in time, please ask the doctor to clarify the cause of the disease, give targeted treatment.