The main reason for nosebleeds in children with fire may be dry air and insufficient humidity in the room, causing increased brittleness of the local mucosa of the nasal cavity leading to bleeding of the nasal blood vessels. It may also be a vitamin C deficiency, which causes an increase in the brittleness of capillaries throughout the body, which manifests itself in the rupture and bleeding of the nasal capillaries. Nosebleeds can also be caused by cold, infection, allergies and other nasal diseases. As the nasal mucosa is damaged after the nasal cavity is infected, it is very easy for the nasal blood vessels to rupture and cause bleeding when there is a fire. The cause of fire is most likely due to lack of water in the body and not drinking enough water, so children should be given the job of drinking water more often.