Children with nosebleeds may have the following aspects: First, the nasal capillaries are particularly rich, capillary fragility is relatively high, when the indoor environment of the air is relatively dry, there can be spontaneous bleeding, or blowing their noses with force can appear bleeding. Second, may suffer from chronic rhinitis, nasal mucosa long-term congestion, edema and erosion, can appear spontaneous bleeding, or nasal mucus with blood. Third, nasal diseases, such as nasal polyps, deviated septum, often recurring nasal bleeding, especially deviated septum, bleeding is often on the side of the deviated. Fourth, systemic hematologic diseases, thrombocytopenia, coagulation abnormalities can be accompanied by localized nasal bleeding.