5-year-old children often nosebleed should be further to the hospital examination, clear cause of the active treatment, can use drugs, surgery, etc., the common causes of physical factors, coagulation problems, oncological diseases. 1. Physical factors: when the indoor air is dry, it will cause part of the secretion in the nasal cavity to solidify and affect breathing, and when the child picks his nose with his hand, it will cause damage, and there will be damage to the nasal mucosa and bleeding. You should change the indoor temperature and humidity, and avoid picking and scratching the nostrils forcefully. 2. Coagulation problems: if the child has thrombocytopenic purpura and other diseases, there will be coagulation disorders, resulting in bleeding tendency, when the wall of the blood vessels in the nasal cavity is fragile, it can cause bleeding and bleeding, you can follow the doctor’s instructions to use phenol ethylamine and other hemostatic drugs, and for the treatment of the primary disease. 3. Tumor: when there are nasopharyngeal carcinoma, sinus carcinoma and other diseases, nosebleed or blood in nasal mucus may appear, which needs further perfect examination, clear diagnosis and active surgical treatment. It is suggested that parents should pay attention to their children’s nosebleeds, further improve the examination and treatment, clarify the cause of the disease and actively treat it.