Children picking their noses may damage the respiratory barrier, cause nosebleeds, induce infections and other hazards. 1. Destroying the respiratory barrier: children picking their noses are more likely to damage the nasal hairs and mucous membranes in the nasal cavity, reducing the ability of the nasal cavity to filter bacteria and dust, which may damage the respiratory barrier. 2. Nasal bleeding: nasal mucosa is very fragile, picking the nose is easy to damage the nasal mucosa and small blood vessels. If it hurts the parts with dense blood vessels, the blood vessels may rupture, leading to nosebleeds. 3. Induce infection: children have a lot of bacteria and other microorganisms on their hands, often picking their noses is more likely to allow bacteria to enter the nasal cavity, leading to nasal infection, causing nasal inflammation, such as turbinate, sinusitis, and so on. If the child has habitual nose picking action, parents need to help correct in time, usually pay attention to ensure that the air humidity of the room.