Children often have nosebleeds at night, we should pay attention to the following situations: First, we should pay attention to whether the child has chronic rhinitis, sinusitis, dry nasal mucosa prone to nosebleeds. Second, we should pay attention to whether the child has the habit of picking the nostrils, some children often pick their nostrils, nails are not trimmed, unconsciously picking nostrils when sleeping, causing nasal mucosa capillary damage resulting in nosebleeds. Third, some children bleed due to thrombocytopenia or coagulation dysfunction, and nasal mucosal bleeding is often the first and most common clinical manifestation. Fourth, it may be a congenital problem of the nasal cavity, such as the presence of congenital deviated nasal septum, nasal malformation or the presence of nasal polyps, which may also cause frequent nosebleeds.