Children picking their noses and getting nosebleeds may be caused by ruptured blood vessels in the nasal mucosa, or may be caused by dry rhinitis, deviated septum and other diseases. 1. Nasal mucosal blood vessel rupture: If the child often picks his nose, it will lead to damage to the nasal mucosa, capillary rupture of the situation, manifested as nosebleeds. 2. Dry rhinitis: dry rhinitis may be caused by abnormal climate, indigestion, vitamin deficiency and other factors. Children may have nosebleeds, nasal congestion, dryness inside the nose, reduced nasal secretions and other symptoms, and the symptoms of nosebleeds may be aggravated when children pick their noses. 3. Deviated nasal septum: The causes of deviated nasal septum include developmental abnormalities, trauma, sinus tumors, heredity and other factors. Symptoms include nasal congestion, nosebleed, headache, tinnitus, etc. When the child picks his nose, it will stimulate the mucous membrane of the nasal cavity, leading to the aggravation of the symptoms of nosebleed. There are many reasons why children pick their noses and have nosebleeds, so parents are advised to bring their children to regular hospitals to find out the cause of the problem.