Nosebleeds in seven-year-olds can be caused by frequent nose picking, nasal dryness, deviated septum and other reasons. 1. Often picking the nose: the child’s own bad behavior, such as often randomly picking the nose, may lead to nasal mucosa capillary rupture bleeding symptoms, resulting in a seven-year-old child nosebleed. 2. Nasal dryness: children who usually have a large amount of activity, but do not like to drink water, and at the same time the humidity of the living environment is relatively poor, resulting in excessive dryness of the nasal mucosa, may also often appear dry nasal mucosa rupture bleeding. 3. Nasal septum deviation: children with severe nasal septum deviation may induce repeated nosebleed symptoms. If a seven-year-old child has frequent nosebleeds, he or she needs to be taken for a detailed examination of the nose as soon as possible to look for the suspected part of the nasal cavity where the bleeding is occurring and the corresponding cause of the bleeding, as well as for treatment.