Children picking their nose nosebleeds need to identify the cause, may be physiological, may also be pathologic. Physiological reasons need to adjust the lifestyle, pathologically caused by the need for targeted treatment under the guidance of a doctor, such as drug therapy. 1. physiological: hot weather or living environment is too dry, etc., can lead to nasal mucosa dry, can increase the risk of nasal blood vessel rupture, bleeding. At this time, it is necessary to correct the child’s bad habit of pulling out the nostrils, and improve the indoor humidity, if necessary, add a humidifier. 2. Pathological: most of the children’s nosebleeds are caused by inflammation of the nasal mucosa, such as allergic rhinitis or chronic rhinitis, long-term inflammation will stimulate the nasal mucosa, resulting in the texture of the mucous membrane becomes thin and brittle or dry, in the case of trauma or stimulation, easy to cause mucosal rupture and lead to bleeding. Nasal rinsing with sea salt water can be used daily. For allergic rhinitis, antihistamines such as cetirizine hydrochloride syrup can be applied if necessary, which has an anti-allergic effect. For chronic rhinitis, in addition to etiologic treatment, drugs such as 0.05% hydroxymetazoline and glucocorticoid sprays can be used to relieve symptoms. However, this symptom alone is not enough to diagnose the disease, and it may be caused by other factors. Therefore, parents are advised to bring their children to the doctor in time, so that the doctor can clarify the cause of the disease and give them targeted treatment, and do not blindly self-medicate. All of the above medications should be used under a doctor’s supervision.