Babies always have nosebleeds, clinically there may be the following reasons: 1, local causes, such as having dry rhinitis, dry nasal mucosa is easy to induce the rupture of the blood vessels under the mucosa, thus bleeding. Acute rhinitis, allergic rhinitis, uncomfortable in the nasal cavity children are prone to blow their noses, pick their noses, resulting in the erosion and rupture of the mucosa is also prone to bleeding. Deviated nasal septum, the protrusion is easy to suffer from airflow impact, making the mucosa thinner, and the submucosal blood vessels are also prone to rupture and bleeding.2. Systemic factors, such as having severe thrombocytopenia, coagulation factor deficiency, anatomical structural abnormalities of the blood vessel wall and functional defective diseases, such as hereditary hemorrhagic capillary dilatation, vitamin C deficiency, allergic purpura and other diseases, also tend to induce nasal bleeding.3. Other types, patients, for example, have nasal foreign bodies, and repeated erosion and infection of foreign bodies in the nasal cavity, are also prone to repeated nosebleeds.