Nasal picking by children may cause damage to the mucous membrane of the nasal cavity and bacterial infections. Children like to pick their nostrils, the fingernail may damage the mucous membrane of the nasal cavity and the surrounding capillaries, etc., and there is a slight nasal bleeding. If the blood vessels are denser, it will cause repeated bleeding, easily blocking the nostrils and affecting breathing. In addition, after the nasal hairs as well as mucous membranes in the nasal cavity are damaged, their barrier protection will be reduced, and they cannot effectively filter bacteria and dust, making the organism susceptible to bacterial infections and other conditions. Children picking their noses may have other hazards, parents need to help correct the behavior of children like picking their noses in time, to help children develop the correct behavior. It is also important to pay attention to keep the humidity in the home in the right range, the child in feeling comfortable, the behavior of picking their nose will also have a corresponding reduction.